Mechanics | Relativity Answers

A ball is dropped from a balloon going up at a speed of 7 m/sec. If the balloon was at a height 60m at the time of dropping the ball, how long will the ball take to reach the ground?

A car of mass 480 kg moving at a speed of 15 m/s is stopped in 10 seconds. Calculate the force applied by the brakes.

the human body can safely tolerate a vertical acceleration of 9 times that due to gravity , with what minimum radius of curvature may a pilot safely turn the plane upward at the end of a dive if the plane 's speed is 770 km/h ?

P/S : my book answer : 519 meter.

a ballon starts raising from ground with an acceleration of 1.25m/s^2. after 8sec a body is released from it. what is the time taken by the body to reach the ground.

a particle has an initialvelocity of 9m/s due south and a constant acceleration of 2m/s^2 due to north,find the distance travelled by the car in the 5th sec of its motion.

a ball having a momentum p hits a bat and its momentum becomes -p .what is the change in the momentum of the ball?

How does the length of a pendulum string affect the frequency of oscillation?

A log is floating downstream. How would you calculate the drag force acting on it?

In an experiment involving an ideal gas the pressure (p) of the gas is plotted against the reciprocal of the volume (1/v) of the gas at constant temperatures. The graph is..............

a freely falling covers 0.1m in 0.1sec and 0.2m in next 0.1sec. find the value of acceleration due to gravity at the place.