Vocabulary
Energy moving from one object to another
What is Energy Transfer?
A wagon is pushed in a straight line. How would an increase in friction on the wagon wheels affect the wagon?
It would cause the wagon to slow down.
A bowling ball moves across a flat surface at 7 feet per second. If a student is asked to calculate the total distance traveled by the ball, what other information does the student need to know?
total time the ball rolled
What is speed?
A measurement of how the position of the object changes over time
What are the different types of forces?
Gravity and friction
A type of force that is caused when one object rubs against another
What is friction?
A runner measured the time it took him to run 5 km. What can he calculate from the distance and time measurements?
SPEED
What causes a wagon to speed up when going down a hill?
GRAVITY
What is the equation you would use to find the speed of an object?
Speed = Distance/time
If we apply force, what can we cause?
Movement,Change in speed, direction, and shape
The amount of force needed to keep objects down on Earth
What is weight?
What would explain why a bicycle slows down when its brakes are applied?
The brakes cause frictional forces on the wheels of the bicycle.
If we had two objects that we wanted to move. Both objects have different masses. Do you think it is easier to move the object that has more mass, or is it easier to move the object with less mass?
Less mass
A family was going on a vacation. They left their home and traveled 105 miles to the hotel. It took the family 5 hours. What was their average speed?
What type of energy is having the ability to do something in the future.
Potential energy
A measurement of how the position of the object changes over time
What is speed?
A ball is kicked and rolls along a level field until it comes to a stop. What is most responsible for the ball coming to a stop?
FRICTION
A student uses a bat to hit a softball with a certain force. Then, she hits a heavier ball with the same force. How does the heavier ball move compared with the lighter softball?
More slowly and not as far
What is the speed of a cheetah that runs 300 miles in 5 hours?
60 mph
What type of energy includes a book falling off of a book shelf, a spring being released and popping up, a rubberband being released and flying across the room.
Kinetic energy
A force that acts against the pull of gravity
If a car is moving backward along a road, can its speed be measured?
Yes, it can, because the car travels a distance in a certain amount of time.
What do you call two forces that are not equal in size.
Unbalanced forces
A nascar driver has a car that is one of the fastest. In 4 hours, the car can travel 600 miles. What is the average speed?
150 mph
How does gravity keep us down on Earth?
Gravity is a force that pulls us down