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6. true or false: mass = weight x gravitational field strength, is the correct relationship between mass weight and gravitational field strength?
7. what is the first law of motion?
- balanced forces means no change in velocity
- a resultant force means acceleration
8. which other name for friction is used when talking about things moving through the air?
- resistance
- terminal velocity
- resultant force
9. what affects your braking distance?
- how much friction there is
- how fast you are travelling
- all of the above
- how good the brakes are
- how heavy you are
10. true or false: drugs do not affect the thinking time of a person
11. what is the formula for work done?
- distance = work done x force
- work done = force x distance
- force= work done x distance
12. true or false: the formula for work done only works if the force is moving in the same direction as the movement?
13. kinetic energy has what formula?
- kinetic energy= 1/2 x mass x velocity²
- kinetic energy = 1/2 velocity x mass²
- kinetic energy = mass x velocity²
14. what is an example of elastic potential energy?
- an airplane
- a spring
- a peanut
15. an example gravitational potential energy is...
- a peanut on the floor
- a peanut held at height
- a peanut on a table
16. what is the relationship between mass, momentum and velocity?
- momentum = mass / velocity
- momentum = mass x velocity
- mass= momentum x velocity
17. true or false: momentum before (event) = momentum after (event)
18. what does friction cause?
- static
- electricity
- energy
19. true or false: positive charges move in static electricity?
20. what happens when you increase the voltage in a circuit?
- the current will increase
- the current will decrease