Mechanics | Relativity Answers

a cricket ball of mass 500g is moving with a velocity of 10m/s hits a wall and returns with same speed in opposite direction. If the collision lasts for 0.1 sec, then find the force acting on the ball

A large 3kg object hangs from a rope wound on a 40 kg wheel. The wheel has an actual radius of 0.75m and a radius of gyration of 0.60m. Find the angular acceleration and the distance through which the weight will fall in the first 10s.

A cart moving horizontally along a straight line with constant speed of 30 m/s. A projectile is fired from the moving cart in such a way that it will return to the cart has moved 80 m. At what speed (relative to the cart) and at what angle (to the horizontal) must the projectile be fired?

A cart moving horizontally along a straight line with constant speed of 30 m/s. A projectile is fired from the moving cart in such a way that it will return to the cart has moved 80 m. At what speed (relative to the cart) and at what angle (to the horizontal) must the projectile be fired?

A racing car of mass 1000kg moves around a banked track at a constant speed of 30ms. Assuming the total reaction at the wheels is normal to the track and the horizontal radius is 100m. Calculate the angle of inclination of the track to the horizontal.

In a system of the Atwood machine with masses of 6kg and 10kg. (a) What is the tension in the chord connecting the masses? (b) What is the acceleration of the masses? Assume that the pulley is frictionless and rope massless. Take g = 9.8m/s2

A large 3kg object hangs from a rope wound on a 40 kg wheel. The wheel has an actual radius of 0.75m and a radius of gyration of 0.60m. Find (a) the angular acceleration and (b) the distance through which the weight will fall in the first 10s.

A string of wood is wound around a wheel of radius 20cm. How large is the angle through which the wheel must turn to unwind 30cm of the string?

An object is thrown upward at an angle of 37 degrees with a velocity of 10m/s from the top of a 20m high building. Where, from the foot of the building, would it land?

At what altitude above the earth’s surface would the acceleration due to gravity be 4.9m/s2? Assume the radius of the earth is 6.4 x 10 raise to power 6 m and the acceleration due to gravity on the surface of the earth is 9.8m/s2