Class 11 Physics · Chapter 2 · Test 2
Projectiles, Momentum and Collisions
43 MCQs This test covers projectile motion and its height, time of flight and range, along with momentum, impulse and the law of conservation of momentum. It also covers elastic and inelastic collisions in one and two dimensions and rocket propulsion.
43 questions · 35 min · 43 marks
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Sample questions
The first 5 of 43. Try each one, then tap to see the answer.
Question 1
The projectile gains its maximum height at an angle of:
- A0 degrees
- B45 degrees
- C60 degrees
- D90 degrees
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Answer: D
H = v^2 sin^2(theta) / 2g is maximum when sin(theta) = 1 i.e. theta = 90 degrees.
Question 2
The range of a projectile is the same for two angles which are:
- APerpendicular
- BSupplementary
- CComplementary
- DEqual
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Answer: C
R = v^2 sin(2 theta)/g and sin(2 theta) is the same for theta and (90 degrees - theta).
Question 3
The acceleration of a projectile at the top of its trajectory is:
- AMaximum
- BMinimum
- CZero
- DEqual to g
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Answer: D
The only acceleration acting on a projectile is the downward acceleration due to gravity g throughout its flight.
Question 4
The SI unit of impulse is:
- AN
- BN s
- CJ
- DW
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Answer: B
Impulse = F x t so its unit is newton second (N s) which equals kg m s^-1.
Question 5
The rate of change of momentum is:
- AForce
- BImpulse
- CAcceleration
- DEnergy
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Answer: A
Newton's second law states that the time rate of change of momentum of a body equals the applied force.
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