Physics Semester 1 Final

Question 1

In physics, work is defined as

Accepted Answer

force times distance

Question 2

How much power is extended if you lift a 60 N crate 10 meters in 1 second?

Accepted Answer

600 W

Question 3

What is the velocity at time t= 8s?

Accepted Answer

0 m/s

Question 4

A 40kg ball has a momentum of 20 kg*m/s. What's the ball's speed?

Accepted Answer

5 m/s

Question 5

How much work is done on a 60-N box of books that you carry horizontally across a 6-m room?

Accepted Answer

0 J

Question 6

As an object falls freely in a vacuum, its

Accepted Answer

velocity increases

Question 7

The momentum of an object is defined as the object's

Accepted Answer

mass times its velocity

Question 8

A 2kg ball is thrown at 3m/s What is the ball's momentum?

Accepted Answer

6kg*m.s

Question 9

An object is shot upward at 34.3 m/s. how high does it go?

Accepted Answer

60 m

Question 10

A 60- N object moves at 1m/s. Its kinetic energy is

Accepted Answer

3 J

Question 11

If the force acting on a cart doubles, what happens to the cart's acceleration?

Accepted Answer

It havles

Question 12

Kinetic energy

Accepted Answer

one half the product of its mass times its speed squared

Question 13

Slo Le drops his water bottle and catches it when it has fallen 0.1 m, what's his reaction time

Accepted Answer

0.14 s

Question 14

If Kelly's speed increases so she has 3 times the momentum,then her kinetic energy increases by

Accepted Answer

9 times

Question 15

A toy car moves at 8 m in 4 s at the constant velocity, what is the car's velocity?

Accepted Answer

2 m/s

Question 16

A woman weighing 550 N sits on the floor. She exerts a force on the floor of

Accepted Answer

550 N

Question 17

How much power is required to do 40 J of work on an object in 5 seconds?

Accepted Answer

8 W

Question 18

The amount of potential energy possessed by an elevated object is equal to

Accepted Answer

the force needed to lift it

Question 19

The unit of work is the

Accepted Answer

joule

Question 20

The resistance an object has no changes in its rotational state of motion is called rotational

Accepted Answer

inertia

Question 21

The unit of power

Accepted Answer

watt

Question 22

A ball is moving at 6 m/s and has a momentum of 24kg*m/s What is the ball's mass?

Accepted Answer

4 kg

Question 23

The momentum change of an object is defined as the object's

Accepted Answer

mass times its velocity

Question 24

Which has more rotational inertia, bicycle wheel or solid disk of the same mass and diameter

Accepted Answer

The wheel

Question 25

Suppose an object is in free fall. Each second the object falls

Accepted Answer

a larger distance than in the second before

Question 26

Acceleration is defined as the CHANGE in

Accepted Answer

velocity divided by the time interval

Question 27

A train moves at a constant velocity of 50 km/h. how far will it move in 0.5 h?

Accepted Answer

25 km

Question 28

Are you going to fail this final?

Accepted Answer

I have no idea what I'm doing, No! I'm pulling an all nighter tonight, I'm confident I'm going to pass, Yes.... Ms. Arnashus doesn't believe in me.

Question 29

If the velocity of a moving object doubles, then what else doubles?

Accepted Answer

momentum

Question 30

A tow truck exerts a force of 2000 N on a car, accelerating it at 1m/s^2. Mass of the car?

Accepted Answer

2000 kg

Question 31

A vector quantity has

Accepted Answer

magnitude and direction

Question 32

Which objects roll down an incline with the greatest acceleration

Accepted Answer

objects with small rotational inertia

Question 33

Speed is

Accepted Answer

both

Question 34

Power is defined as the

Accepted Answer

the work done on an object times the distance it moves

Question 35

One possible unit of speed is

Accepted Answer

all of the above

Question 36

A scalar is a quantity that has

Accepted Answer

magnitude

Question 37

Potential energy is the energy an object has because of its

Accepted Answer

location

Question 38

Acceleration is defined as

Accepted Answer

the rate at which velocity changes

Question 39

A freely falling object starts from rest. After falling for 6 seconds, its speed will be about

Accepted Answer

60 m/s

Question 40

The law of inertia applies to

Accepted Answer

both

Question 41

A collision is considered elastic if

Accepted Answer

all the above

Physics Semester 1 Final

Questions 41

Physics Semester 1 Final

Questions 41