Force and motion 1
What is an example of kinetic energy?
Answer: moving soccer ball, moving water, a person running(answers may vary)
10. Light travels at 300,000,000 m/s. This is an example of what?
Answer: speed
What is friction?
A force between an object and the surface it is moving over.
What is mass?
The amount of matter that makes up and object.
What does it mean to infer?
To reach a conclusion using evidence and reasoning.
If each ball starts at rest, what is its initial velocity?
Answer: zero
A sailboat moves faster as the wind picks up speed. This is an example of what?
Answers: acceleration
How would you measure the speed of an animal? (hint: the formula)
Answer: divide the distance by time.
A train travels North at 103 km/h. This is an example of what?
Answer: Velocity
What is an example of potential energy?
Answer: Food, charged battery, (answers may vary)
A balloon moves vertically upward at 5m/s. This is an example of what?
Answer: velocity
A car moving 20m/s accelerates to pass a truck. Five seconds later the car is moving 30 m/s. What is the acceleration of the car?
Answer: 2 m/s
What is the average speed of someone who walks 3 kilometers in 1 hour?
Answer: 3 km/h
What is the speed of a rocket that travels 9,000 meters in 12 seconds?
Answer: 750m/s