ECAT Pre General Science Physics Chapter 3 Motion and Force Online Test With Answers

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ECAT Pre General Science Physics Chapter 3 Motion and Force Online Test

Sr. # Questions Answers Choice
1 During the upward motion of the projectile, the vertical component of velocity. Decreases Increases Remains constant None of these
2 If m means mass of gases objected per second from a rocket and v shows the change in velocity, than mv is named as: Force Energy work impulse
3 Change in momentum is one second called. Impulse Force Energy Work
4 The collision in which KE is conserved but momentum is not conserved is called: Elastic collision Inelastic collision any these None of these
5 When the mass of the colliding body is much larger than the mass of the body at rest, its velocity after collision. Becomes half Becomes zero Ramains same Becomes double
6 If two bodies of equal masses moving in the same direction collide elastically, then their velocities. Are added Are subtracted Do not change Are exchanged
7 Acceleration in a body is always produced in the directin of: Velocity Weight Force Botha B and C
8 A train cover 90 km in half an hour. the time taken by it to travel 15 km will be: 20 minutes 48 minutes 10 minutes 5 minutes
9 The path followed by the projectile is known as: Cycle Hyperbola Trajectory Route
10 During the upward motion of the projectile, the vertical component of velocity: Decreases Increases Remains constant None of these
11 Change in momentum is one second is called: Impulse Force Energy Work
12 Which quantity has the same dimension as that of impulse? KE Power Momentum Work
13 The product of force and time is called change in: Momentum Impulse Force Both a and b
14 Newton's first law is also called: Law of torque Law of force Law of inertia None of these
15 Acceleration in a body is always produced in the direction of : Velocity Weight Force Both B and C
16 If the acceleration of a body is not uniform, then velocity-time graph will be: Curve Straight line Sphere All of these
17 If the acceleration of a body is negative, then slope of the velocity-time graph will be: Zero Positive Negative Infinity
18 Distance covered by a freely failing body n the first second of its motion will be: 4.9 m 9.8 m 19.6 m 29.4 m
19 When the total displacement is divided by total time taken, we get: Velocity Average speed Average velocity None of these
20 The decrease in velocity per unit time is called: Variable Acceleration Average Acceleration Retardation None of these
21 The distance covered by a body in unit time is called. Displacement speed Velocity Both B and C
22 One newton is a force that produces an acceleration of 0.5 m/sec2in a body of mass: 2 Kg 3 Kg 4 Kg 8 Kg
23 Force is a: Scalar quantity Base quantity Derived quantity None of these
24 An object is dropped from a height of 100 m. Its velocity at the moment it touches the ground is: 100 m/sec 140 m/sec 1960 m/sec 196 m/sec
25 Body which falls freely under gravity provides good example of motion under: Uniform acceleration Non-uniform acceleration Uniform velocity None of these
26 Swimming becomes possible because of______law of motion. First Second Third None of these
27 A dirty carpet is to be cleaned by heating. This is in according with______law of motion. First Second Third None of these
28 A certain force gives an acceleration of 2 m/sec2to a body mass 5 kg. The same force would give a 20 kg object an acceleration of: 0.5 m/sec<sup>2</sup> 5 m/sec<sup>2</sup> 1.5 m/sec<sup>2</sup> 9.8 m/sec<sup>2</sup>
29 Slope of velocity time graph represents: Acceleration Speed Torque Work
30 In above figures, tell which set of graphs shows that a body is moving with uniform velocity: (i) and (ii) (ii) and (iii) (iii) and (iv)
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