ECAT Pre Engineering Physics Chapter 3 online mcq test with answers for chapter 3 (Motion and Force)

Physics ECAT Pre Engineering Chapter 3 Motion and Force Online Test

Sr. #	Questions	Answers Choice
1	A ball is dropped downwards After 1 second another ball is dropped downwards from the same point. What is the distance between them after 3 seconds	25 m 20 m 50 m 9.8 m
2	If a train traveling at 72 kmph is to be brought to rest in a distance of 200 meters then its retardation should be	20 ms<sup>-2</sup> 10 ms<sup>-2</sup> 2 ms<sup>-2</sup> 1 ms<sup>-2</sup>
3	A car travels first half distance between two places with a speed of 30 km/h and remaining half with a speed of 50 km/h. The average speed of the car is	37.5 km/h 10 km/h 42 km/h 40 km/h
4	If an iron ball and a wooden ball of the same radius was released from a height 'h' in vacuum, then time taken by both of them to reach ground will be	Unequal Exactly equal Roughly equal Zero
5	A body falls freely from rest. It covers as much distance in the last second of its motion as covered in the first three seconds. The body has fallen for a time of	3 s 5 s 7 s 9 s
6	A person is sitting in a traveling train and facing the engine. He tosses up a coin and the coin falls behind him. It can be concluded that the train is	Moving forward and gaining speed Moving forward and losing speed Moving forward with uniform speed Moving backward with uniform speed
7	The mass of a body measured by a physical balance in a lift at rest is found to be m, if the lift is going up with an acceleration a, its mass will be measured as	m (1 - a/g) m (1 + a/g) m Zero
8	A lift is moving up with acceleration equal to 1/5 of that due to gravity. The apparent weight of a 60 kg man standing in lift is	60 kg wt 72 kg wt 48 kg wt Zero
9	A monkey sits on the pan of spring scale kept in an elevator. The reading of the spring scale will be maximum when	Elevator is stationary Elevator cable breaks and it falls freely towards earth Elevator accelerates downwards Elevator accelerates upward
10	A lift is descending at a constant speed V. A passenger in the lift drops a coin. The acceleration of the coin towards the floor will be	Zero g -g V + g
11	A vehicle of mass 120 kg is moving with a uniform velocity of 108 km/h. The force required to stop the vehicle in 10s is	120 x 10.8 N 180 N 720 N 360 N
12	Essential characteristic of equilibrium is	Momentum equal to zero Acceleration equal to zero Kinetic energy equal to zero Velocity equal to zero
13	If a car rest acceleration uniformly to a speed of 144 km/h in 20 s it covers a distance of	20 m 400 m 1440 m 2880 m
14	A ball falls on the surface from 10 m height and rebounds to 2.5 m. if the duration of contact with the floor is 0.01 seconds then the average acceleration during contact is	2100 m/s<sup>2</sup> 1400 m/s<sup>2</sup> 700 m/s<sup>2</sup> 400 m/s<sup>2</sup>
15	By which velocity a ball be projected vertically so that the distance covered by it in 5th seconds is twice the distance it covers in its 6th second ( g=10m/s²)	58.8 m/s 49 m/s 65 m/s 19.6 m/s

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