Force and Motion

What is motion?

• the stopping of an object to a frame of reference

• a change in position relative to a frame of reference

• the middle ground between light and shadow

• a change in time relative to a frame of reference

An elevator traveled 15 floors (50m) at a speed of 4.5 m/s. What additional information is needed to determine the velocity of the elevator?

• the total distance the elevator traveled

• how long the elevator was stationary

• how many times the elevator stopped

• the direction the elevator traveled

What is speed?

• how far you go

• how much distance is covered over a period of time

• the rate at which your motion changes

• the change in the position of a object

Find the velocity of a truck that travels 75 miles north in 2.5 hours.

• 187.5 mph north
• 30 mph north
• 300 mph north
• 200 mph north

You ride your bike around the block at a constant speed of 11 km/h.

• Acceleration occurred because speed increased.

• Acceleration occurred because speed decreased.

• Acceleration occurred because you changed directions.

• Acceleration occurred because your speed is constant

You ride your skateboard in a straight line at a constant speed of 5 km/h.

• Acceleration occurred because speed increased.

• Acceleration did not occur because neither speed nor direction changed.

• Acceleration occurred because you changed directions.

• Acceleration occurred because your speed was constant.

What are forces that have a net force of zero Newtons?

• Balanced forces

• Unbalanced forces

• Net minus forces

• Forces can not have a net of zero

The sum of all forces acting on an object.

• Total Force

• Balanced Force

• Unbalanced Force

• Net Force

What is a Force?

• Motion

• Mass

• A push or pull

• Energy

This type of force resist motion between two surfaces that are pressed together

• contact

• gravity

• friction

• applied