Force & Motion

What is the force that causes objects to fall to Earth?

• Air resistance
• Gravity
• Water resistance
• Pressure

What will cause an object to move?

• Applied forces
• Balanced forces
• Unbalanced forces

If an object is stationary (not moving) the forces acting upon it are _____________

• unbalanced
• weak
• balanced
• Hulk Smash!

Which one is balanced?

• top
• bottom
• both

What is it?

• Pull

• Friction

• Push

• Heavy

What is the net force?

• 20 N 
• 0 N 
• 400 N 
• 40 N 

What is the net force?

• 10 N
• 0 N
• 25 N
• 1 N

The sum of all forces acting on an object.

• Contact Force
• Balanced Force
• Unbalanced Force
• Net Force

You and your dad are moving the couch from one side to another. Your dad pushes with a force of 35 N to the right and you push with a force of 25 N right. What is the net force on the couch?

• 60 N right
• 10 N left
• 60 n right
• 50 N left

Suppose that an astronaut throws a baseball in outer space at a location far from significant influences of gravity and air resistance. One would expect that the baseball would ____.

• eventually stop since all objects ultimately "lose their steam"

• eventually stop as its inertia slowly becomes used up

• continue in motion with the same speed and direction

• either a, b, or c -- depending on whether the astronaut continues to push it