physics exam

Question 1

sig fig rules

Answer 1

• all none zero digits in a measurement are significant
• zeroes that come after the decimal and after a none zero digit are significant
• leading zeroes are not significant
• trailing zeroes with no decimals are assumed to not be significant

Question 2

2 large categories of motion

Answer 2

• constant velocity

- acceleration

Question 3

position

Answer 3

the direction or place of an object

Question 4

distance

Answer 4

How much ground an object has covered during its motion

Question 5

displacement

Answer 5

a vector quantity which refers to how far out of place an object is

Question 6

speed

Answer 6

how far an objects moved in a certain amount of time

Question 7

velocity

Answer 7

movement

Question 8

acceleration

Answer 8

increase in the rate/speed of something

Question 9

Kinetic energy

Answer 9

Energy an object possesses because of its motion

Question 10

Potential energy

Answer 10

Energy of position

Question 11

Inertia

Answer 11

Ability of an object to resist change in motion

Question 12

Momentum

Answer 12

The product of mass and velocity

Question 13

Force

Answer 13

A push or pull

Question 14

3 safety features in vehicles using newtons law

Answer 14

Airbags, crumple zones, seat belts

Question 15

Airbags

Answer 15

When a collision occurs, they extend time which slows down the force experienced by the passenger

Question 16

Seat beats

Answer 16

Keep the passengers travelling at the same speed as the car which keeps them from being thrown due to inertia

Question 17

Crumple zones

Answer 17

Engineers designed cars to crumple, absorbing kinetic energy as distribution of force over time is applied

Question 18

Impulse

Answer 18

The product of force and time

Question 19

Newtons 3 laws

Answer 19

• objects will remain at rest or in a straight line uniform unless acted upon an unbalanced force
• acceleration is directly proportional to force and inversely proportional to mass
• for every action there is an equal and balanced reaction

Question 20

Rules for adding and subtracting

Answer 20

Your calculated value should have the same precision as your least precise measurement

Question 21

Rules for multiplying and dividing

Answer 21

Your calculated value answer should have the same number of sigfigs as the least sigfigs in your measurement