Force in motion

Speed is defined as

• the stronger force has a better advantage

• distance traveled per unit of time

• top speed

• low speed

Equation for speed

• S= D/T

• D= S/T

• T= T/S

• EVO= X

The __________________the slope, the faster an object moves.

• Higher

• Steeper

• Friction

• Rougher

This occurs whenever two surfaces meet and rub against each other?

• Inertia

• Gravity

• Friction

• Brevity

The strength of gravitational pull depends on __________ & __________.

• Friction and weight

• Mass and distance

• Gravity and elements

• Air resistance

According to Newton's 2nd law, if force increases and mass stays the same then what will happen to acceleration?

• Decrease

• Increase

• Reduced momentum

• Velocity changes

1. Alfonso, Julia, and Margie were having fun as they rolled some office chairs across a flat floor. All three chairs have the same mass. Margie gave each of the chairs a push, but not all from the same direction. Each chair changed speed as a result of being pushed. Use the information in the diagram to answer.

Which chair(s) experienced the strongest force when it was pushed? How do you know?

• Neither chair was ever hit

• The pink chair sped up by 78 M/S

• All three chairs experienced the same strength force because they changed speed by the same amount.

Three boats were moving across the surface of a smooth lake. The gray and pink boats have the same mass, and both of these boats are more massive than the orange boat. Each boat was bumped by another boat, but not from the same direction. Use the information in the diagram to answer.

Which boat(s) experienced the strongest force when hit? How do you know?

• The gray and pink boats experienced the strongest force because they are both more massive than the orange boat, and they all changed speed by the same amount.

• The red boat experienced the most force

• The carbon fiber boat experienced the most force

• The orange boat sped up by 79 m/s

Alice and Kai were playing air hockey, which is a game where players hit a puck with paddles so the puck slides across a table. After the game, they were crashing the puck and two different paddles. The puck was the same in both crashes, but the paddles were different: the red paddle had less mass, while the purple paddle had more mass. Use the information in the diagram to answer.

In which crash did the puck experience a stronger force? Why?

• Crash 2; the force on the purple paddle was stronger in this crash, so the force on the puck was also stronger.

• The wooden puck

• No puck was ever hit

• all of the above

How is force exerted?

• Pull

• Push

• Inertia

• Push and Pull