Entrance Preparation (After SEE) → Important Questions(1.3)

Important Questions(1.3)

A ball thrown vertically upwards with a speed of 9.6m/s from the top of a tower retuns to the earth in 6sec .Find height of the tower.
a) 112m b)118.7m
c)119.7m d) 112.7m
Newton’s first law of motion gives the concept of
a) Energy b) work
c) inertia d) momentum
A ball of mass 50gm is thrown upwards. It rise to a maximum height of 100m. At what height its kinetic energy will be reduced by 70%?
a) 30m b) 40m
c) 60m d) 70m
A ball is thrown vertically upwards. Which one of the following quantities stays constant?
a) displacement b) speed
c) kinetic energy d) acceleration
A ball is Project vertically upwards. Its acceleration at the highest point is:
a) Zero b) can’t be predicted
c) directed upwards d) directed downwards
A ball is thrown vertically upwards in air. If air resistance cannot be neglected then the acceleration of the ball at the highest point is:
a) g b) >g
c) <g d) 0
The product of force and time of application of force gives .
a) Linear momentum b)impulse c) Energy d) Torque
A bomb is released from a horizontally flying aeroplane. The trajectory of the bomb is:
a) Straight line b) hyperbola
c) parabola d) circle
Two bodies, one lighter and other heavy, have equal kinetic energies, which of them has greater momentum?
a) the heavy one b) the lighter one
c) both have same momenta d) none of above
A ball takes t sec to fall from height h1 and 2t sec to fall from height h2. The ratio of height h1:h2 is:
a) 1:2 b) 2:1
c) 1:4 d) 4:1
The numerical value of average velocity to average speed is:
a) always less than one b) always greater than one
c) always equal to one d) equal or less than one
Newton’s first law of motion gives the concept of:
a) energy b) work
c) inertia d) momentum
The impulse is equal to
a) linear momentum b) impulse
c) energy d) torque
Which one of the following force is conservative ?
a) electrostatic force b) frictional force
c) viscous force d) air resistance
Rocket work on the principle of conservation of
a) mass b) energy
c) linear momentum d) angular momentum