Finals Review 2.0: Force & Motion

A rocket's thrusters fire downward, yet the rocket experiences an upward force. Which law does this demonstrate?

• Newton's 1st Law
• Newton's 2nd Law
• Newton's 3rd Law

A fireman turns on a hose and is knocked backwards by the water moving forwards. Which law best demonstrates this?

• Newton's 1st Law
• Newton's 2nd Law
• Newton's 3rd Law

It takes more force to move a bowling ball than a baseball. Which law explains the relationship?

• Newton's 1st Law
• Newton's 2nd Law
• Newton's 3rd Law

A soccer ball will not move until it is kicked. Which law explains this best?

• Newton's 1st Law
• Newton's 2nd Law
• Newton's 3rd Law

It takes less force to pull an empty wagon than a wagon with someone in it. Which law explains this relationship best?

• Newton's 1st Law
• Newton's 2nd Law
• Newton's 3rd Law

An object is pushed with a 50 N force to the right and a 30 N force to the left. Find the net force.

• 50 N to the right
• 30 N to the left
• 20 N to the right
• 80 N to the right

An airplane exerts 5000 N of thrust forwards and has 2000 N of air resistance (friction). What is the net force?

• 5000 N forwards
• 2000 N backwards
• 7000 N forwards
• 3000 N forwards

Forces of friction always _________ the direction of motion.

• Oppose
• Change
• Match
• Are perpendicular to

How much net force is needed to accelerate a 25 kg bicycle at 3 m/s2? F = m*a

• 22 N
• 28 N
• 50 N
• 75 N

50 N of force acts on a 10 kg object. What will the acceleration be? F = m*a

• 500 m/s2
• 50 m/s2
• 5 m/s2
• 0.2 m/s2