1.how much work is done in lifting a 60 kg sack of rice to a vertical of 10 m?


2. Fred exerts a 120 N force in pushing a wheelbarrow loaded with garden soil.if he pushes it 50 m at a constant speed for 20 s, what is his power in watts?

3.what power in watts in employed in lifting a 500 N block of wood to a distance of 20 m in 60 s? ​