Define range of a projectile.

1 How much would a 70kg man weigh on the moon? What would be his mass on the earth and on the moon? (Acceleration due to gravity on moon=1.63m/s²). 2 What is the mass of an object whose weight is 49 newtons? 4 A body of weight 600N rests on the floor of a lift. If the lift begins to fall freely under gravity, what is the force with which the body presses on the floor? 5 State the condition under which a stone attached to a spring balance is said to be weightless.