Q. 524.1( 7 Votes )
The troops (soldiers) equipped to be dropped by parachutes from an aircraft are called paratroopers. Why do paratroopers roll on loading?
When you hit the ground, the ground exerts a force up on you to stop you. The force which it exerts depends on how long the collision lasts. You have no control over your mass or the speed you hit the ground, but you can increase the time and reduce the rate of change in momentum and rolling is one such trick. Hence, we would get less hurt.
Rate this question :
A Honda City car, A Maruti Alto car, A Tata Nano car and a Mahindra Scorpio car, all are running at the same speed of 50 m/s under identical conditions. If al these cars are hit from behind with the same force and they continue to move forward, the maximum acceleration will be produced in: Mass of the different vehicles: Honda City – 1150Kg, Maruti Alto-720Kg, Tata Nano-600Kg,Mahindra Scorpio-2510Kg
A. Honda City B. Maruti Alto
C. Tata Nano D. Mahindra ScorpioLakhmir Singh & Manjit Kaur - Physics
A fielder pulls his hands backwards after catching the cricket ball. This enables the fielder to:
A. Exert larger force on the ball
B. Reduce the force exerted by the ball
C. Increase the rate of change of momentum
D. Keep the ball in hands firmlyLakhmir Singh & Manjit Kaur - Physics
The rocket work on the principle of conservation of:
A. Mass B. Energy
C. Momentum D. VelocityLakhmir Singh & Manjit Kaur - Physics
A bullet of mass 10 g is fired horizontally with a velocity of 150 ms–1 from a pistol of mass 2 kg. Find the recoil of the pistol.Together with Science