Sophie Howlett, Ashley López, Marta Barreda - Gravitational Motion, Rotational Motion, work, Energy.

Question 1

What is the definition of work?

Answer 1

a force applied through a displacement.

Question 2

Newton’s law of gravitation applies to

Answer 2

All bodies irrespective of their size

Question 3

What is the equation for Work?

Answer 3

W=Fd cos 0

Question 4

What is gravitational force defined as?

Answer 4

Is the force in which attraction between two objects must be proportional to the objects’ masses

Question 5

Law of gravitation gives the gravitational force between…

Answer 5

Any two bodies having some mass

Question 6

What is the formula for average angular velocity?

Answer 6

The angular displacement divided by the time required to make the rotation.

Question 7

What is the main useful energy transfer that happens in cars?

Answer 7

Chemical to kinetic

Question 8

What are the units for energy?

Answer 8

Joules

Question 9

What is the formula for average angular acceleration?

Answer 9

the change in angular velocity divided by the time required to make that change.

Question 10

What is a torque?

Answer 10

is the tendency of a force to rotate an object about an axis (force x lever arm)

Question 11

What is the formula for torque?

Answer 11

Torque = r x F

where r = the displacement vector, F = the force vector

Question 12

Problem 1 (Work): If the hockey player exerted twice as much force (9.00 N) on the puck over the same distance, how would the amount of work the stick did on the puck be affected?

Answer 12

Doubling the force will also double the work, which both will double kinetic energy as well, to 1.35 Joules.

Question 13

A box of groceries requires five newtons of force to lift it one meter to the counter. How many joules of work is done?

Answer 13

5 Joules

Question 14

Work is the quantity of ____________ used to move an object

Answer 14

energy

Question 15

A box weighing 4N is lifted 3 m. The work is done on the box is ____ joules
The potential energy the box possesses at the top is ____joules

Answer 15

12; 12

Question 16

The rate at which work is done is known as

Answer 16

Power

Question 17

Potential energy is also known as

Answer 17

stored energy

Question 18

Which is the smallest unit of power?

Answer 18

Milliwatt

Question 19

Each joule of work is one _________ (units) of energy

Answer 19

Newton meter

Question 20

A wagon is pulled a horizontal distance of 5 meters with a force of 15 N at an angle of 40 degrees above the horizontal. Find the work done.

Answer 20

Work= 57.5 J

Question 21

Moment of inertia is dependent on

Answer 21

Position of the axis of rotation,

mass, distribution of particles

Question 22

The motion of planets in the solar system is an example of the conservation of

Answer 22

Angular momentum