NTSE SAT Physics Motion Speed Velocity and Acceleration MCQs

Question: A body goes from A to B with a velocity of 20 m/s and comes back from B to A with a velocity of 30 m/s. The average velocity of the body during the whole journey is :

• a) Zero
• b) 24 m/s
• c) 25 m/s
• d) None of these

Answer: Zero

Question: The velocity - time graph of a body falling from rest under gravity and rebounding from a solid surface is represented by which of the graphs shown in figure ?

• a)

  

• b)

  

• c)

  

• d)

  

Answer:

Question: Which of the given distance-time graph (Figure) represents the accelerated motion of a body ?

• a)

  

• b)

  

• c)

  

• d)

  

Answer:

Question: An aircraft has a take off velocity of 180 km/h. What length  of runway is needed ? The acceleration of aircraft along the runway is 2.5 m/s2: 

• a) 100 m
• b) 150 m
• c) 320 m
• d) 500 m

Answer: 500 m

Question: A balloon of mass 1000 kg is floating at some height. If 100 kg mass is released from the balloon. Then the acceleration of the balloon is : [g = 10 ms^-2]           

• a) 1.1 ms^-2 upward  
• b) 1.1 ms^-2 downward   
• c) 10 ms^-2 upward  
• d) 10 ms^-2 downward

Answer: 1.1 ms^-2 upward  

Question: A person travels along straight road for the first half time with a velocity v₁ and the second half time with a velocity v₂. The mean velocity v is given by :

• a)

  

• b)

  

• c)

  

• d)

  

Answer:

Question: A truck traveling due north at 50 km h^-1 turns west and travels at the same speed. What is the change in velocity ?            

• a) 50 km h^-1 north-west 
• b) 50√2km h^-1 north-west
• c) 50 km h^-1 south-west  
• d) 50√2 km h^-1 south-west

Answer: 50√2 km h^-1 south-west

Question: A driver accelerates his car first at the rate of 2.4 m/s² and then at the rate of 1.6 m/s². The ratio of the two forces exerted by the engine in the two cases will be:

• a) 1 : 2
• b) 2 : 1
• c) 2 : 3
• d) 3 : 2

Answer: 3 : 2

Question: A graph between the square of the velocity of particle and the distance s moved by the particle is shown in the figure. The acceleration of the particle in km/h2 is :

• a) 2250
• b) 225
• c) -2250
• d) -225

Answer: -2250

Question: The speed of a body is 1 ms^-1. The angle between distance time graph of the body and the time axis is :

• a) 00
• b) 300 
• c) 450
• d) 600

Answer: 450

Question: A Car accelerates from rest at a constant rate α for some time after which it decelerates at a constant rate β to come to rest. If the total time elapsed is t second, the maximum velocity reached is : 

• a)

  

• b)

  

• c)

  

• d)

  

Answer:

Question: A man is standing 40 m behind the bus. Bus starts with 1 m/s² constant acceleration and also at the same instant the man starts moving with constant speed 9 m/s. The time taken by man to catch the bus will be :

• a) 10 s
• b) 8 s
• c) 5 s
• d) Both (A) and (B) are correct

Answer: Both (A) and (B) are correct

Question: A particle is dropped from a tower. It is found that it travels 55 m in the last second of its journey. They height of tower is : (g = 10 m/s ²)

• a) 125 m
• b) 180 m
• c) 100 m
• d) 55 m

Answer: 180 m

Question: A 150 m long train accelerates uniformly from rest. If the front of the train passes a railway worker 50 m away from the station at a speed of 25 m/s, what will be the speed of the back part of the train as it passes the worker ?

• a) 100 m/s
• b) 20 m/s
• c) 50 m/s
• d) 12.5 m/s

Answer: 50 m/s

Question: A body goes from A to B with a velocity of 20 m/s and comes back from B to A with a velocity of 30 m/s. The average velocity of the body during the whole journey is :

• a) Zero
• b) 24 m/s
• c) 25 m/s
• d) None of these

Answer: Zero