mass and weight

After calling a wall of 3 m heigh a mass of weight W drops himself to the ground. If his body comes to a complete stop in 0.15 s . After his feet touch the ground, calculate the average impulsive force in the vertical direction exerted by ground on his feet.

Define mass, weight and centre of gravity.

Bring out the differecnes between the mass and the weight of a body.

The gravitational force on Jupiter is approximately 2.3 times the gravitational force on Earth. If an object has a mass of 80 kg and a weight of 784 N on Earth, what would the object's mass and weight on Jupiter be?

Carbon and oxygen react with each other in the ratio 3 : 8 by mass. What weight of carbon should be used to react completely with 40 g of oxygen?