Force and Motion - Part 1

Which of the following statements best describes Newton’s First Law of Motion?

• A force is needed to keep an object in motion.

• An object remains at rest or in uniform motion unless acted upon by an external force.

• The acceleration of an object depends on the net force acting on it.

• For every action, there is an equal and opposite reaction.

A ball is rolling on a smooth surface at constant velocity. According to Newton’s First Law, what will happen if no external force is applied?

• It will eventually stop due to inertia.

• It will gradually slow down.

• It will continue moving at the same velocity

• It will change direction automatically.

Newton’s Second Law states that the acceleration of an object is directly proportional to the ______ and inversely proportional to the ______.

• mass, velocity

• force, mass

• force, velocity

• weight, inertia

A 10 kg object is pushed with a force of 50 N. What is its acceleration?

• 0.5 m/s²

• 5 m/s²

• 50 m/s²

• 10 m/s²

What happens when two objects interact according to Newton’s Third Law?

• The larger object exerts a greater force.

• They exert equal and opposite forces on each other.

• The object with more mass exerts no force.

• The forces cancel out completely, preventing movement.