Our Dynamic Universe

Question 1

What does the S in SUVAT stand for?

Answer 1

Displacement

Question 2

What does the U in SUVAT stand for?

Answer 2

Intinal velocity

Question 3

What does the V in SUVAT stand for?

Answer 3

Final velocity

Question 4

What does the A in SUVAT stand for?

Answer 4

Acceleration

Question 5

What does the T in SUVAT stand for?

Answer 5

Time

Question 6

How do you calculate weight down a slope?

Answer 6

Weight-parallel=mgsin0

Question 7

How do you work out a horizontal component?

Answer 7

Horizontal=resultant×cos0

Question 8

How do you calculate a vertical component?

Answer 8

Vertical=resultant×sin0

Question 9

When a lift is Stationary what is the apparent weight equal to?

Answer 9

Actual weight

Question 10

When a lift is moving at a Stationary speed what is apparent weight equal to?

Answer 10

Actual weight

Question 11

When a lift is accelerating up what is apparent weight equal to?

Answer 11

Actual weight +fun

Question 12

When a lift is decelerating down what is apparent weight equal to?

Answer 12

Actual weight + fun

Question 13

When a lift is decelerating up what is apparent weight equal to?

Answer 13

Actual weight - fun

Question 14

When a lift is accelerating down its apparent weight is equal to?

Answer 14

Actually weight - fun

Question 15

What happens to your weight in a lift when the lift is in free fall?

Answer 15

Weightlessness

Question 16

What is the law of conservation of momentum?

Answer 16

The total momentum before a collision equals the total momentum after a collision in the absence of external forces.

Question 17

How do you work out if a collion is elastic?

Answer 17

Calculate kinetic energy before and after a collision. If it is equal then the collision is elastic. If it isn’t equal then it is inelastic.

Question 18

What is impulse equal to?

Answer 18

Change in momentum
Contact force × contact time
Area under a force time graph

Question 19

Is horizontal velocity constant?

Answer 19

Yes

Question 20

Is vertical velocity constant?

Answer 20

No

Question 21

What is the vertical velocity at max height?

Answer 21

Zero

Question 22

Is the speed of light constant in all frames of reference?

Answer 22

Yes

Question 23

Name scalar quantity?

Answer 23

Distance
Speed
Time
Mass
Energy

Question 24

Name vector quantities

Answer 24

Displacement
Velocity
Acceleration
Momentum
Force

Question 25

What does a straight line on a displacement time graph indicate?

Answer 25

Constant velocity

Question 26

What is the gradient of a displacement time graph equal to?

Answer 26

Velocity

Question 27

What is equal to the area under a velocity time Graph?

Answer 27

Displacement

Question 28

What is the gradient of a velocity time Graph equal to?

Answer 28

Acceleration

Question 29

What is newton's first law?

Answer 29

An object will remain at rest, or will continue to move in a straight line at a constant speed, unless acted upon by an unbalanced force.

Question 30

What is newton's second law?

Answer 30

A uniform unbalanced force will produce a uniform acceleration.

Question 31

What does conservation of energy state?

Answer 31

Energy cannot be created or destroyed, only transformed from one form into another.

Question 32

Can energy be created?

Answer 32

No

Question 33

Can energy be destroyed?

Answer 33

No

Question 34

Can energy be transferred from one from to another?

Answer 34

Yes

Question 35

What is the law of conservation of linear momentum?

Answer 35

The total momentum before a collision is equal to the total momentum after a collision in the absence of external forces.

Question 36

What is the total momentum before a collision equal to?

Answer 36

The total momentum after (in the absence of external forces)

Question 37

What is the total momentum after a collision equal to?

Answer 37

The total momentum before a collision (in the absence of external forces)

Question 38

What is the area under a force time graph equal to?

Answer 38

Impulse

Question 39

What is impulse?

Answer 39

Change in momentum

Question 40

How old is the universe?

Answer 40

13.8 billion years old