Second Law Calculations

Science

7th Grade

Multiple Choice

Which object has greater inertia?

Open Ended

If a person hits a softball and a bowling ball with the same force, will they both accelerate at the same rate? Why or why not? Explain your answer.

Open Ended

What net force is needed for a 1600 kg automobile to accelerate at a rate of 2.0 m/s²?

F=ma

Open Ended

A baseball accelerates downward at 9.8 m/s². With negligible air resistance and a net force of 1.4 N, what is the baseball’s mass?

(Hint) F = ma

Open Ended

What force does a car’s engine exert in a car that has a mass of 3,000 kg and is accelerating at 2 m/s² ?

F=ma

Multiple Choice

Newton's Second Law can be expressed as

• v = d / t

• F = ma

• E = mc²

• m₁v₁ = m₂v₂

Multiple Choice

What Unit do we Measure Force in?

• Newtons

• Volts

• Kilograms

• Joules

Multiple Choice

According to __________, the acceleration of an object is equal to the net force acting on the object divided by the object's mass.

• Newton's First Law

• Newton's Third Law

• Inertia

• Newton's Second Law

Multiple Choice

Newton's second law of motion describes acceleration as force divided by __________.

• speed

• inertia

• mass

• direction

Multiple Choice

F= mass * acceleration

A 20 kg bike accelerates at 10 m/s². what is the force acting upon it?

• 25 Newtons

• 200 Newtons

• 20 Newtons

• 10 Newtons

Multiple Choice

An object of mass 10 kg is accelerated upward at 2 m/s². What force is required?

• 20 N

• 5 N

• 2 N

• 0 N

Multiple Choice

When force is 20 N, mass is 5 kg, what is acceleration?

F = ma

• 25 m/s²

• 100 m/s²

• 5 m/s²

• 4 m/s²

Multiple Choice

Will it take more force to push an empty shopping cart or a shopping cart that is full?

• The empty shopping cart

• They will take the same amount of force

• The full shopping cart

• Depends on what is in the full shopping cart

Multiple Choice

An object accelerates 8 m/s² when a force of 40 newtons is applied to it. What is the mass of the object?

• 4 kg

• 20 kg

• 0.2 kg

• 5 kg

Poll

Can you calculate force, mass, and acceleration of an object using Newton's 2nd Law of Motion?

• Yes, it's easy for me.

• No, I don't get it at all!

• I kind of understand how to but could use some more practice :)