Motion in a Straight Line Assignment
Class 11 Physics
Question 1
A car starts from rest with acceleration 2 m/s². Find velocity after 10 s.
Answer: 20 m/s
Question 2
A body moving with velocity 30 m/s slows down uniformly at 5 m/s². Find stopping time.
Answer: 6 s
Question 3
A train accelerates uniformly from 10 m/s to 30 m/s in 20 s. Find acceleration.
Answer: 1 m/s²
Question 4
A stone is dropped from a tower. Find distance covered in 4 s. Take g = 10 m/s².
Answer: 80 m
Question 5
A body moves with initial velocity 5 m/s and acceleration 3 m/s². Find displacement in 6 s.
Answer: 84 m
Question 6
A particle moves with acceleration 4 m/s². If initial velocity is 2 m/s, find velocity after 5 s.
Answer: 22 m/s
Question 7
A bike moving at 25 m/s stops in 5 s. Find retardation.
Answer: −5 m/s²
Question 8
A ball thrown upward with speed 40 m/s. Find maximum height. Take g = 10 m/s².
Answer: 80 m
Question 9
Find time taken by a freely falling body to reach speed 50 m/s. Take g = 10 m/s².
Answer: 5 s
Question 10
A body covers 200 m in 10 s with uniform acceleration. Initial velocity is 10 m/s. Find acceleration.
Answer: 2 m/s²
Question 11
A train moving at 72 km/h is brought to rest in 20 s. Find retardation.
Answer: −1 m/s²
Question 12
A particle moves from rest with acceleration 5 m/s². Find distance covered in 8 s.
Answer: 160 m
Question 13
A stone projected upward reaches maximum height in 3 s. Find projection speed. Take g = 10 m/s².
Answer: 30 m/s
Question 14
A car moving at 15 m/s accelerates at 2 m/s² for 10 s. Find final velocity.
Answer: 35 m/s
Question 15
A body starts from rest and travels 98 m in 7 s. Find acceleration.
Answer: 4 m/s²
Question 16
A particle moving at 20 m/s accelerates uniformly at 3 m/s². Find displacement in 4 s.
Answer: 104 m
Question 17
A body thrown vertically upward returns after 8 s. Find maximum height. Take g = 10 m/s².
Answer: 80 m
Question 18
A car moving with speed 20 m/s stops after travelling 50 m. Find retardation.
Answer: −4 m/s²
Question 19
Find displacement covered by a body in 5 s if velocity changes from 10 m/s to 20 m/s uniformly.
Answer: 75 m
Question 20
A freely falling object reaches ground in 6 s. Find height. Take g = 10 m/s².
Answer: 180 m
Question 21
A train accelerates from 18 km/h to 54 km/h in 10 s. Find acceleration.
Answer: 1 m/s²
Question 22
A particle moving with 12 m/s accelerates at 4 m/s². Find velocity after covering 32 m.
Answer: 20 m/s
Question 23
A ball is thrown upward at 50 m/s. Find total time of flight. Take g = 10 m/s².
Answer: 10 s
Question 24
A car travels first half distance at 20 m/s and second half at 30 m/s. Find average speed.
Answer: 24 m/s
Question 25
A particle starts from rest and travels 125 m in 5 s. Find acceleration.
Answer: 10 m/s²
Question 26
A body moving at 40 m/s is retarded uniformly at 8 m/s². Find stopping distance.
Answer: 100 m
Question 27
Find distance travelled during 8th second by body starting from rest with acceleration 2 m/s².
Answer: 15 m
Question 28
A train moving at 108 km/h stops in 15 s. Find retardation.
Answer: −2 m/s²
Question 29
A body falls freely from rest. Find velocity after falling 45 m. Take g = 10 m/s².
Answer: 30 m/s
Question 30
A particle moves with acceleration 6 m/s². If initial velocity is 8 m/s, find displacement in 5 s.
Answer: 115 m
Question 31
A stone is projected upward with 20 m/s. Find time to reach maximum height. Take g = 10 m/s².
Answer: 2 s
Question 32
A body accelerates uniformly from 5 m/s to 25 m/s in 10 s. Find displacement.
Answer: 150 m
Question 33
A body moving at 30 m/s covers 120 m before stopping. Find retardation.
Answer: −3.75 m/s²
Question 34
Find height reached by a body projected vertically upward with speed 60 m/s. Take g = 10 m/s².
Answer: 180 m
Question 35
A particle covers 90 m in 6 s starting from rest. Find acceleration.
Answer: 5 m/s²
Question 36
A train moving at 54 km/h accelerates uniformly to 90 km/h in 20 s. Find acceleration.
Answer: 0.5 m/s²
Question 37
A freely falling body covers what distance in 5th second? Take g = 10 m/s².
Answer: 45 m
Question 38
A body moving at 10 m/s accelerates uniformly at 2 m/s². Find displacement after 8 s.
Answer: 144 m
Question 39
A stone reaches maximum height of 125 m. Find projection speed. Take g = 10 m/s².
Answer: 50 m/s
Question 40
A particle moving at 25 m/s comes to rest in 5 s. Find displacement during retardation.
Answer: 62.5 m
Question 41
A body accelerates uniformly from 4 m/s to 20 m/s in 8 s. Find acceleration.
Answer: 2 m/s²
Question 42
Find displacement during 10th second for body starting from rest with acceleration 3 m/s².
Answer: 28.5 m
Question 43
A ball dropped from rest reaches ground in 4 s. Find height. Take g = 10 m/s².
Answer: 80 m
Question 44
A car moving at 72 km/h accelerates to 108 km/h in 10 s. Find displacement.
Answer: 250 m
Question 45
A body projected upward returns after 12 s. Find projection speed. Take g = 10 m/s².
Answer: 60 m/s
Question 46
A particle accelerates uniformly from 6 m/s to 30 m/s in 6 s. Find acceleration.
Answer: 4 m/s²
Question 47
A body moving at 50 m/s stops after 250 m. Find retardation.
Answer: −5 m/s²
Question 48
Find average velocity for body travelling 120 m east then 80 m west in 20 s.
Answer: 2 m/s east
Question 49
A train accelerates from rest at 1.5 m/s². Find velocity after travelling 300 m.
Answer: 30 m/s
Question 50
A body moving at 12 m/s accelerates at 4 m/s². Find distance in 3 s.
Answer: 54 m
Question 51
A stone thrown upward with 30 m/s. Find height after 2 s. Take g = 10 m/s².
Answer: 40 m
Question 52
A body starting from rest covers 320 m in 8 s. Find acceleration.
Answer: 10 m/s²
Question 53
A car slows uniformly from 25 m/s to 5 m/s in 10 s. Find retardation.
Answer: −2 m/s²
Question 54
Find displacement in 4 s for body with u = 10 m/s and a = 5 m/s².
Answer: 80 m
Question 55
A body projected upward with 40 m/s. Find time to return to ground. Take g = 10 m/s².
Answer: 8 s
Question 56
A train moving at 20 m/s accelerates at 2 m/s². Find distance in 5 s.
Answer: 125 m
Question 57
A particle moving at 18 m/s stops in 6 s. Find retardation.
Answer: −3 m/s²
Question 58
Find maximum height reached by body projected upward with 80 m/s. Take g = 10 m/s².
Answer: 320 m
Question 59
A body falls from height 245 m. Find time taken. Take g = 10 m/s².
Answer: 7 s
Question 60
A particle accelerates from 2 m/s to 18 m/s in 4 s. Find displacement.
Answer: 40 m
Question 61
A train moving at 90 km/h stops in 25 s. Find retardation.
Answer: −1 m/s²
Question 62
A body moving with acceleration 5 m/s² covers 225 m in 9 s. Find initial velocity.
Answer: 2.5 m/s
Question 63
Find distance travelled in 7th second for body accelerating at 4 m/s² from rest.
Answer: 26 m
Question 64
A ball projected upward with 70 m/s. Find maximum height. Take g = 10 m/s².
Answer: 245 m
Question 65
A body moving at 16 m/s accelerates at 3 m/s². Find velocity after 6 s.
Answer: 34 m/s
Question 66
A car moving at 30 m/s stops in 150 m. Find retardation.
Answer: −3 m/s²
Question 67
A body falls freely for 8 s. Find velocity acquired. Take g = 10 m/s².
Answer: 80 m/s
Question 68
A train accelerates uniformly from 36 km/h to 72 km/h in 20 s. Find distance covered.
Answer: 300 m
Question 69
A particle projected upward reaches height 180 m. Find initial velocity. Take g = 10 m/s².
Answer: 60 m/s
Question 70
A body accelerates from 8 m/s to 32 m/s in 6 s. Find displacement.
Answer: 120 m
Question 71
Find distance travelled in 3rd second for body with acceleration 6 m/s² from rest.
Answer: 15 m
Question 72
A car moving at 24 m/s slows to 12 m/s in 6 s. Find retardation.
Answer: −2 m/s²
Question 73
A body projected upward returns after 14 s. Find maximum height. Take g = 10 m/s².
Answer: 245 m
Question 74
A particle accelerates uniformly from rest at 2.5 m/s². Find displacement in 12 s.
Answer: 180 m
Question 75
A body moving at 40 m/s stops in 8 s. Find distance covered.
Answer: 160 m
Question 76
A ball falls freely from height 125 m. Find impact speed. Take g = 10 m/s².
Answer: 50 m/s
Question 77
A train accelerates from 15 m/s to 45 m/s in 15 s. Find acceleration.
Answer: 2 m/s²
Question 78
A particle with u = 6 m/s and a = 2 m/s². Find distance in 7 s.
Answer: 91 m
Question 79
A body projected upward with 100 m/s. Find time to reach top. Take g = 10 m/s².
Answer: 10 s
Question 80
A body moving at 18 m/s accelerates at 4 m/s². Find velocity after 5 s.
Answer: 38 m/s
Question 81
A body covers 360 m in 12 s starting from rest. Find acceleration.
Answer: 5 m/s²
Question 82
A particle moving at 28 m/s stops after 98 m. Find retardation.
Answer: −4 m/s²
Question 83
Find displacement in 9th second for body with a = 2 m/s² from rest.
Answer: 17 m
Question 84
A body projected upward reaches top in 4 s. Find maximum height. Take g = 10 m/s².
Answer: 80 m
Question 85
A train moving at 25 m/s accelerates at 1 m/s². Find displacement in 20 s.
Answer: 700 m
Question 86
A body moving at 50 m/s slows uniformly to 10 m/s in 8 s. Find retardation.
Answer: −5 m/s²
Question 87
A freely falling body reaches ground in 9 s. Find velocity on impact. Take g = 10 m/s².
Answer: 90 m/s
Question 88
A particle accelerates uniformly from 12 m/s to 36 m/s in 6 s. Find displacement.
Answer: 144 m
Question 89
A body projected upward with 90 m/s. Find maximum height. Take g = 10 m/s².
Answer: 405 m
Question 90
A car moving at 20 m/s accelerates at 3 m/s². Find displacement in 4 s.
Answer: 104 m
Question 91
A train moving at 108 km/h stops in 30 s. Find retardation.
Answer: −1 m/s²
Question 92
A body starts from rest and covers 242 m in 11 s. Find acceleration.
Answer: 4 m/s²
Question 93
Find distance covered during 6th second by body with acceleration 5 m/s² from rest.
Answer: 27.5 m
Question 94
A body projected upward returns after 20 s. Find initial velocity. Take g = 10 m/s².
Answer: 100 m/s
Question 95
A particle accelerates from 5 m/s to 35 m/s in 10 s. Find displacement.
Answer: 200 m
Question 96
A car moving at 15 m/s stops after travelling 45 m. Find retardation.
Answer: −2.5 m/s²
Question 97
A body falls from height 320 m. Find time taken. Take g = 10 m/s².
Answer: 8 s
Question 98
A train accelerates from rest at 2 m/s². Find distance in 15 s.
Answer: 225 m
Question 99
A body projected upward with 120 m/s. Find maximum height. Take g = 10 m/s².
Answer: 720 m
Question 100
A particle moving at 10 m/s accelerates uniformly at 5 m/s². Find displacement in 8 s.
Answer: 240 m