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Flashcards in Exam 3/16/17 Deck (41)
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1

How many radians are in a circle?

2

The symbol for the SI unit of angular speed is...

rad/second, or s-1.

3

What 2 factors does gravitational force depend?

Radius and mass

4

The symbol G in the formula for Newton's law of gravitation is...

6.674 x 10⁻¹¹ and it is a universal constant.

5

What is the unit of work?

joule

6

The force exerted by a spring is called a(n) (Hint: Persons name)

Hooke's law force

7

The SI unit of power is the...

watt

8

How much will the kinetic energy of a school bus increase if its velocity is doubled?

4 times

9

Provide 2 examples of conservative forces.

1) Gravity
2) Central forces
3) Hookes Law forces
4) Electric force.

10

Provide 2 examples of non-conservative forces.

1) Friction
2) Air resistance

11

The formula Ug = |mg| h is used to determine

gravitational potential energy.

12

mechanical energy that objects possess because of position or condition

potential energy

13

the SI unit of energy and work

joule

14

the rest position of a system (the state of 2 forces balancing out)

equilibrium

15

a value used in Hooke's Law with the units N/m. (represented by k).

Spring constant

16

the energy transferred to or from a system as a force acts on it through a displacement

Work

17

SI unit of power

Watt

18

a scientific law that states that within the elastic limit of a material, the restoring force is directly proportional to the displacement of the system from its equilibrium position

Hooke's Law

19

the property of a system that gives it the ability to do work

Energy

20

a force that can convert kinetic energy to potential energy and vice versa without loss

Conservative Force

21

the sum of the potential energy and kinetic energy of a system

total mechanical energy

22

the time-rate at which work is performed.

power

23

a lever in which the load is between the fulcrum and the effort force

second-class lever

24

the ratio of the output force of a machine to its input when friction is not present

ideal mechanical advantage

25

a lever in which the fulcrum is between the resistance load and the effort force

first-class lever

26

the ratio of useful work output to work input for a machine

efficiency

27

the ratio of a machine's output force to its input force

actual mechanical advantage

28

a raised surface. (A ramp)

inclined plane

29

a lever in which the effort force is applied between the fulcrum and the load

third-class lever

30

what is an example of a third-class lever?

broom
tweezers