What is the equation for Speed?
Balanced forces acting on an object?
Never change the object’s motion.
What is Motion?
____ opposes motion between surfaces that are touching?
Friction
What happens when two forces act in the same direction?
They add together.
Speed equals distance divided by
Time
What is Mass?
The measurement of the amount of matter in an object.
What is Velocity?
Speed on an object in a particular direction.
The ____ is the unit of force?
N
Newton
Find Speed?
20m in 5s
4m/s
When you know both the speed and direction of an object’s motion, you know the?
Velocity of the object.
What is Friction?
Friction is a force that works against the motion of an object.
Solve:
Speed= 50m/25s=
2m/s
____ is determined by combining forces?
Net Force
Find Speed?
60m in 12s
5 m/s
If a bicyclist travels 30 kilometers in two hours, her average speed is?
15 km/h.
What is the SI unit for Force?
N
Newton
Explain the difference between speed and velocity?
Speed does not include direction. Velocity does include direction.
Acceleration is the rate at which ____ changes.
Velocity
A student practicing for a track meet ran 250m in 50 seconds. What was her average speed?
5 m/s
If you know a car traveled 300 kilometers in 3 hours, you can find its?
Average speed
10 N East
Find the average speed of a person who swims 105 m in 70 s?
1.5 m/s
_____ is the measurement of the gravitational force on an object.
Weight
Bill ran 400m in 54s. Joe ran 300m in 43s. Who ran faster?
400/54=7.4 m/s Bill
300/43=6.9 m/s Joe
Joe!