Physics
Force and Motion
Page 9 of 11
#65 Two bodies are projected at angles \(\theta\) and \((90^\circ - \theta)\) with the horizontal at the same speed. The ratio of their maximum heights is
A) 1:1
B) 1:\(\tan \theta\)
C) 1:\(\tan \theta\)
D) \(\tan 2\theta : 1\)
#66 An athlete completes one round of a circular track of radius R in 40 s. What will be the displacement at the end of two minutes
A) 0
B) 2 R
C) R
D) 3\pi R
#67 When the mass and speed of a body are doubled, K.E of body would
A) Become 4 times
B) Become 8 times
C) Become 6 times
D) Remain unchanged
#68 When a fighter plane chasing another plane opens fire, its speed
A) Increases
B) Remains same
C) Decreases
D) First decreases then increases
#69 If two forces inclined at 120° with each other are acting on a body of mass m, then the acceleration produced in the body will be
A) \(\frac{F}{m}\)
B) \(\frac{3F}{m}\)
C) \(\frac{2F}{m}\)
D) \(\frac{F}{2m}\)
#70 At the highest point on the trajectory of a projectile, its
A) Potential energy is minimum
B) Kinetic energy is maximum
C) Total energy is maximum
D) Kinetic energy is minimum
#71 If air is considered, then the maximum height achieved by the projectile
Decreases
Increases
Remains same
Very difficult to answer as no data provided
Page 9 of 11
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