Forces (based on Newton's 1st and 2nd Law)

What happens when unbalanced forces act on an object?

• It will accelerate

• It will keep moving at a constant velocity

• It will stay at rest

• There is no way to know

Which object has the MOST inertia?

• A bee

• A bicycle

• A BMW (car)

• A boat (cruise ship)

Which of these statements is always true about an object that has A LOT of inertia? (There might be more than one!)

• It is easy to move around

• It has a lot of mass

• It is very difficult to accelerate

• It is very small

What does it mean for an object to accelerate?

• Its velocity is constant

• Its velocity is changing

• It is at rest

• It is spinning in place

If you apply the same force to four different masses, which one will accelerate the quickest?

• The one with the smallest mass

• The one with the largest mass

• They will all accelerate the same

• None of them will accelerate

Arnoldo crushes a baseball with his bat, making the 0.145 kg ball accelerate at a rate of 38000 m/s². How much force did he apply to the ball?

• 38000 N

• 260000 N

• 2100 N

• 5500 N

What is the magnitude of the net force on this object?

• 200 N

• 1400 N

• 600 N

• 800 N

What direction will it accelerate? (What direction is the net force?)

• Up

• Left

• Right

• Down

Are all of the forces on this object balanced?

• Yes

• No

• There is no way to tell from the diagram

Which of the forces is NOT balanced?

• Normal Force

• Friction

• Gravity

• They are all balanced