WORK, ENERGY, AND ENERGY CONSERVATION

Question 1

is a scalar product (dot product) of two vectors
force and displacement.

Answer 1

Work

Question 2

W=

Answer 2

Fdcosθ

Question 3

When is work done positive?

Answer 3

Theta between zero to 89 degrees

Question 3

When is work done positive?

Answer 3

Theta between zero to 89 degrees

Question 4

When is work done negative?

Answer 4

Theta between 91 to 180 degrees

Question 5

When is work done zero?

Answer 5

Theta equals 90 degrees

Question 6

When is work done maximum?

Answer 6

Theta equals zero or 180 degrees

Question 7

What happens to work done as the angle increases from 1
degree to 89 degree?

Answer 7

Work decreases

Question 8

Attributed to mas and position.

Answer 8

Potential Energy

Question 9

Associated with mass and speed

Answer 9

Kinetic Energy

Question 10

If work is done on an object, it causes a change
in

Answer 10

kinetic energy

Question 11

Positive work causes kinetic
energy to

Answer 11

increase

Question 12

Negative work causes kinetic
energy to

Answer 12

decrease

Question 13

The work done by causes a
change in gravitational potential energy

Answer 13

gravitational force

Question 14

For a falling object, the gravitational
force and displacement are both

Answer 14

downward

Question 15

Even if the work done is positive,
the gravitational PE

Answer 15

decreases