A 5 Kg object is accelerating at 5 m/s². What is the force that is applied to the object? Mannee I need help with this please

Aball bearing at 220.0 °c is dropped into a cup containing 250.0 g of water at 20.0 °c. the water and ball bearing come to a temperature of 30.0 °c. what is the heat capacity of the ball bearing in j/°c? (hint: how are the algebraic signs of q related for the ball bearing and the water? )

Which simple machine is not part of this compound machine? a. lever b. pulley c. inclined plane d. wheel and axle

Ababy stroller is a rest on top of a hill which is 10 m high. the stroller and baby have a mass of 20 kg. what is the potential energy of the baby and stroller?