5.1 Newton's 1st Law

Draw

Where would the water spill out of the cup?

Multiple Choice

A ball is sitting still on a plate. How could the ball start moving?

• The ball's inertia disppears.

• All the forces on the ball stop.

• A new, balanced force acts on the ball.

• A new, unbalanced force acts on the ball.

• A

Multiple Choice

A driver stops suddenly at a red light. He is thrown forward against the seatbelt. Why?

• A force pushes him forward when he stops.

• The force of the seatbelt pushes him backwards.

• A force pushes the whole car forward, including the driver.

• The force of the brakes stops the car, but not the driver.

Multiple Choice

A car turns left suddenly. The drink in the drink holder falls over onto the person sitting in the right-hand seat. Why?

• The car turns left, but the drink continues going straight, tipping it to the right.

• The car turns left, and the drink is pushed in the opposite direction.

• The car turns left, and the force causes the drink to move. It could have fallen either way.

• The force of the turn pushes both the car and drink to the left, but the drink isn't pushed as much.