Midterm

Question 1

Explain what work is

Question 2

What does the cos(theta) term represent in W = F d cos(theta)? Why is it needed when we calculate work?

Question 3

What are the SI units of work?

Question 4

Is work scalar or vector?

Question 5

Can the work done by a force be positive? Can it be negative?

Question 6

What is the equation for the force of an ideal spring? Is this force constant or variable with position?

Question 7

Identify each term in the force of an ideal spring equation and give SI units

Question 8

Can constant acceleration kinematics be used to study motion when spring forces act?

Question 9

Given a graph of the spring force versus position, how do you find the spring constant k for an ideal spring?

Question 10

What does the spring constant represent about the spring?

Question 11

How do you use a force versus position graph to calculate the work done by a variable force?

Question 12

What does the kinetic energy of a body represent?

Question 13

What is the equation for calculating KE? Identify each term and its SI unit

Question 14

Is KE scalar or vector?

Question 15

What does the gravitational potential energy of a body represent?

Question 16

What is the equation for calculating the gravitational PE? Identify each term and its SI unit

Question 17

Is gravitational PE scalar or vector?

Question 18

What does the elastic potential energy represent?

Question 19

What is the equation for calculating elastic PE? Identify each term and its SI unit

Question 20

Is elastic PE scalar or vector?

Question 21

What is the work-energy theorem?