Physics Review 1-4

Question 1

How many forces are acting on the bottom box?

Accepted Answer

3

Question 2

rise over run; the steepness of the line

Accepted Answer

slope of a line

Question 3

A graph whose slope indicates velocity and who shows displacement

Accepted Answer

x-t graph

Question 4

The ball is sitting on the table what are the forces and directions?

Accepted Answer

Gravity down and normal up

Question 5

Change in velocity (Delta) is equal to

Accepted Answer

V - Vo

Question 6

What forces are acting on you on an elevator?

Accepted Answer

gravity and normal

Question 7

What type of collision is shown in the picture?

Accepted Answer

Inelastic

Question 8

Joe starts a race 3m from the origin, at 3 m/s and accelerates at 4 m/s/s for 12 sec, Find x.

Accepted Answer

x=327m

Question 9

A graph whose slope indicates acceleration and area indicates displacement

Accepted Answer

v-t graph

Question 10

Does a small force always produce a smaller change in an object's momentum?

Accepted Answer

No

Question 11

What is the net force for the 45 kg girl on the 50 kg swing held by two ropes.

Accepted Answer

0 N

Question 12

Change in velocity over time

Accepted Answer

acceleration

Question 13

Impulse equals

Accepted Answer

change in momentum

Question 14

A projectile is launched up from a 30 m cliff at 30 m/s. What is its maximum height?

Accepted Answer

75.9 m

Question 15

The horizontal acceleration of a projectile is:

Accepted Answer

0 m/s/s

Question 16

What is the VERTICAL force of impact when the cannon lands?

Accepted Answer

117.6 N

Question 17

This can NOT be solved using kinematic simple.

Accepted Answer

acceleration

Question 18

What is the total force acting on this object?

Accepted Answer

5 N

Question 19

Descriptions and equations of motion

Accepted Answer

kinematics

Question 20

The force of the bat on the ball has what relation to the force of the ball on the bat?

Accepted Answer

The force is equal

Question 21

For all collisions/interactions, this is conserved.

Accepted Answer

Momentum

Question 22

A 20 kg rifle fires a 1 kg bullet at 10 m/s. What is the recoil velocity of the rifle?

Accepted Answer

- 0.5

Question 23

What has more momentum, a sports car moving at 30 mph or the same sports car moving at 60 mph?

Accepted Answer

Sports car at 60 mph

Question 24

Given height, what can you find?

Accepted Answer

velocity and time

Question 25

Action and reaction... Which law is this?

Accepted Answer

3rd Law

Question 26

what is a balanced force?

Accepted Answer

when two forces are equal and the object does not move.

Question 27

Is Momentum conserved for this type of collision shown in the picture? (Newton's Cradle)

Accepted Answer

Yes

Question 28

How many newton's must the guy on the left be in order for him to not be moving?

Accepted Answer

900 N

Question 29

The formula F (force) = M (mass) x A (Acceleration) applies to Newton's __________ law.

Accepted Answer

2nd Law

Question 30

The area of a(n) _ graph indicates a change in velocity.

Accepted Answer

a-t graph

Question 31

What is the type, receiver and agent for the upward force shown?

Accepted Answer

there is no upward force

Question 32

Two skaters are initially at rest. They now push off each other, the total momentum is now

Accepted Answer

zero

Question 33

The speed of a particle is tripled, by what factor is the momentum changed.

Accepted Answer

3

Question 34

Seat belts and air bags save lives and reduce injury because they reduce the force on a body by

Accepted Answer

Increasing the time it takes to stop

Question 35

F=MA stand for

Accepted Answer

force=mass times acceleration

Question 36

A 20 kg rifle fires a 1 kg bullet at 10 m/s. What is the total momentum of the system before?

Accepted Answer

0

Question 37

How would GBJ (Type On By) for the right diagonal force be labeled?

Accepted Answer

tension, sled, rope

Question 38

What are the units for Force?

Accepted Answer

Newton's, Kg * M / S2

Question 39

when you slow down are you accelerating?

Accepted Answer

yes

Question 40

what is mass?

Accepted Answer

how much matter is a object

Question 41

A 100 kg cart is traveling with a speed of 4 m/s to the left, what is the momentum of the cart?

Accepted Answer

- 400

Question 42

What was the launch velocity (Vox) ?

Accepted Answer

141.576 m/s

Question 43

The higher the mass, the higher the acceleration. What law is this?

Accepted Answer

2nd Law

Question 44

Literally how far an object has moved.

Accepted Answer

distance

Question 45

Molly goes 300m at 1.2 m/s/s. How fast is she going at the end?

Accepted Answer

v= 26.8 m/s

Question 46

What is the acceleration of the cart?

Accepted Answer

10 m/s/s right

Question 47

The law of inertia is also known as Newton's _____ law.

Accepted Answer

1st Law

Question 48

By how many Newtons are Daniel and Maria winning this tug of war?

Accepted Answer

2 N

Question 49

What is the vertical velocity when the cannon lands?

Accepted Answer

20.765 m/s

Question 50

An object won't move unless acted with an unbalanced force.

Accepted Answer

1st Law

Question 51

In order to reduce the amount of force felt during a collision, this should be done

Accepted Answer

Increase the time duration

Question 52

Distance and direction of an object's change in position from the starting point

Accepted Answer

displacement

Question 53

How long is the cannon in the air?

Accepted Answer

2.119 s

Question 54

Motion under the influence of gravity alone

Accepted Answer

free fall

Question 55

If the mass of Box A is 12 kg, what is the force of normal from Box B?

Accepted Answer

118 N

Physics Review 1-4

Questions 55

Physics Review 1-4

Questions 55