Forces Unit Review

A car with a mass of 1115 kg accelerates at 0.18 m/s² when 200 N of force is applied. If the mass doubles and the force is the same what would the new acceleration be?

• 0.09 m/s²

• 0.36 m/s²

• 200.7 N

• 200.7 m/s²

A friend throws a ping-pong ball and a basketball to you with the same amount of force. Which would accelerate more and why?

• The basketball because it was thrown with more force.

• The basketball because it has more mass.

• The ping-pong ball because it has less mass.

• The ping-pong ball because it was thrown with more force.

A friend throws a ping-pong ball and a basketball to you with the same amount of force. Which Newton's Law describes the concept of which would have a greater acceleration?

• Newton's 1st Law

• Newton's 2nd Law

• Newton's 3rd Law

• None because Newton's Laws are just about motion.

What is the net force and direction of movement for this object?

• 6 N up

• 8.5 N left

• 1.5 N right

• 1.5 N left

How did you determine the net force?

• Look for the largest force and that is your net force.

• Add the opposite forces to get a combined net force.

• Subtract the opposing forces to find the net force. You also give a direction.

• Add all the numbers together to get the total force on the object.

Net force is the vector _______ of all the ________ acting on an object.

• sum, forces

• direction, forces

• force, quantities

Newton's 1st Law state that an object in motion stays in motion or an object at rest stays at rest unless acted upon by a/an

• opposite force.

• unbalanced force.

• heavier mass.

• gravitational force.

What is Newton's 2nd Law? (check all that apply)

• Object's do not move without a force being applied.

• The relationship between force acting on an object's mass and the resulting acceleration.

• Force = mass x acceleration

• for every action force there is an equal and opposite reaction force.

Which formula would you use first to calculate force if you have mass, 2 velocities, and change in time?

• F = ma

• a = f/m

• a = V_f - V_i / t

• v = d/t

Which formula would you use second to calculate force if you have mass, 2 velocities, and change in time?

• F = ma

• a = f/m

• a = V_f - V_i / t

• v = d/t