Q.1
A body can have energy without momentum.
  • a) True
  • b) False
Q.2
A particle is acted upon by a force of a constant magnitude which is always perpendicular to the velocity of the particle. The motion of the particle takes place in a plane. It follows that ___________
  • a) Its velocity is constant and kinetic energy is constant
  • b) Its acceleration and velocity is constant
  • c) Its kinetic energy is constant and it moves in a circular path
  • d) Its acceleration is constant and it moves in a circular path
Q.3
An athlete in the Olympic game covers a distance ofin 10s. His kinetic energy can be estimated in the range?
  • a) 200J – 500J
  • b) 2×105J – 3×105J
  • c) 20000J – 50000J
  • d) 2000J – 5000J
Q.4
A particle of massis thrown vertically upwards with a speed of 5m/s. The work done by the force of gravity during the time the particle goes up is ___________
  • a) 1.25J
  • b) 0.5J
  • c) -0.5J
  • d) -1.25J
Q.5
StatementLinear momentum of a system of particles is zero.
  • a) 1 does not imply 2 and 2 does not imply 1
  • b) 1 implies 2 but 2 does not imply 1
  • c) 1 does not imply 2 but 2 implies 1
  • d) 1 implies 2 and 2 implies 1
Q.6
A spherical ball of mass 20kg is stationary at the top of a hill of height 100m. It rolls down a smooth surface to the ground, then climbs up another hill of heightand finally rolls done to a horizontal base at a height ofabove the ground. The velocity attained by the ball is ___________
  • a) 10m/s
  • b) 10√30m/s
  • c) 40m/s
  • d) 20m/s
Q.7
If mass-energy equivalence is taken into account when water is cooled to form ice, the mass of water should ___________
  • a) Increase
  • b) Remain unchanged
  • c) Decrease
  • d) First increase and then decrease
Q.8
A body moves a distance ofunder the action of force F = 10N. If the work done isJ, the angle which the force makes with the direction of motion is?
  • a) 0°
  • b) 30°
  • c) 60°
  • d) None of the mentioned
Q.9
Two bodies of mass andhave equal kinetic energy. What is the ratio of their momentum?
  • a) 1:4
  • b) 1:2
  • c) 1:1
  • d) 2:1
0 h : 0 m : 1 s