quiz 2 ( Weight )
1. Define the weight if an object and state its SI unit.
2. Weite down the relationship between mass, weight and gravitational acceleration.
3.Evaluate the following statements. Correct any false statements.
(a) Weight is considered a force.
(b) The greater the pull of gravity, the greater thr weight of an object.
(c) Weight of an object anywhere in the universe is the same.
(d) Weight is equal to mass.
(e) A 5kg object has a weight of 100N on the surface of the Earth.
4. A metal sphere weighs 50N on the moon. The gravitational field strength on the moon is 1/6 of that on the earth. The sphere is released from a height of 5m above the surface of the Earth.
(a) State the acceleration of the sphere.
(b) State the acceleration of the sphere if it is released at the same height above the surface of the Moon.
(c) Calculate the weight of the sphere on the Moon.
(d) Would the speed of the sphere just before it touches the surface be the same on the Earhtth and the Moon? Explain.
5. A 1m metal rod of mass 60kg and weight 6ooN on the Earth is brought to the moon where the gravitational acceleration is just 1/6 that of the Earth. The rod is then cut into two equal lengths.
(a) state the mass of one length of the rod.
(b) state the weight of one length of the rod.