A glass marbles, whose mass is 100g, falls from a height of 40m and rebounds to a height of 10m. Find the impulse and the vaergae force between the marble and the floor, if the time during which they are in contact is 0.2 s. take `g=9.8 ms^(-2)`.

A ball of mass 50 g falls from a height of 10 m and rebounds to a height of 5 m.Find the impulse and average force between the ball and ground if both were in contact for 0.1 second.

A stone dropped from the top of a tower of height 300 m high splashes into the water of a pond near the base of the tower. When is the splash heard at the top given that the speed of sound in air is 340 m s^-1 ? (g = 9.8 m s^-2)

A bullet of mass 50 g is fired from a gun. If the bullet acquires a velocity of 100 m s^(1) in 0.1 second, what is the recoil force on the gun?

An object of mass 40 kg is raised to a height of 5 m above the ground. What is its potential energy ? If the object is allowed to fall, find its kinetic energy when it is half-way down. Take g = 10 ms ^-2 .

An object is dropped from a height of 120 m. The acceleration of the object is 10m/s downwards. Find the distance travelled by the object after 2s. What is the final velocity of the object after 3s?

A ball is thrown upwards from the top of a tower 40 m high with a velocity of 10 m/s. Find the time when it strikes the ground. Take g=10 m//s^2.

Find the magnitude of electron field which just balances a deuteron of mass 3.2 xx 10^-27 kg . (Take g = 10 ms^-2).

Find the magnitude of electric field which will jut balance a deutron of mass 3.2 xx 10^-27 Take g = 10 ms^-2

A ball is dropped from a height of 90 m on a floor. At each collision with the floor, the ball loses one tenth of its speed. Plot the speed-time graph of its motion between t = 0 to 12 s.

If the distribution of weight is uniform, then the rope of the suspended bridge takes the form of parabola.The height of the supporting towers is 20m, the distance between these towers is 150m and the height of the lowest point of the rope from the road is 3m. Find the equation of the parabolic shape of the rope considering the floor of the parabolic shape of the rope considering the floor of the bridge as X-axis and the axis of the parabola as Y-axis. Find the height of that tower which supports the rope and is at a distance of 30 m from the centre of the road.