Physics 1

Question 1

What is the equation for distance?

Answer 1

distance = speed x time

Question 2

What is the equation for time?

Answer 2

time = distance/speed

Question 3

What is the equation for speed?

Answer 3

speed = distance/time

Question 4

A sprinter runs 100 m in 10 sec. What is their speed? (don’t forget the units!!)

Answer 4

10 m/s

Question 5

Calculate the speed of a car that takes 90 sec to travel 360 m (don’t forget the unit!!)

Answer 5

4 m/s

Question 6

Calculate the speed of a train that travels 2.7 km in 1.5 mins. Give your answer in m/s

Answer 6

30 m/s

Question 7

How long does it take for a boat travelling at 8 miles/hour to travel 10 miles? Give the unit

Answer 7

75 mins

Question 8

What are forces?

Answer 8

Forces are pushes or pulls that can change the motion of an object

Question 9

What are examples of forces?

Answer 9

weight
friction
air resistance
upthrust

Question 10

What are forces measured in?

Answer 10

Newtons

Question 11

What are the forces for a stationary duck sitting on a lake?

Answer 11

Upthrust (upwards)

Weight (downwards)

Question 12

What is mass?

Answer 12

Amount of matter (stuff)
Measured in kg
Same everywhere

Question 13

What is weight?

Answer 13

A force due to GRAVITY
Measured in Newtons
Changes on different planets

Question 14

What is the equation for calculating weight?

Answer 14

Weight (N) = Mass (kg) x Gravitational field strength (N/kg)

w = m x g

Question 15

Describe gravitational field strength

Answer 15

This is different for different planets
Units are N/kg
Earth: g = 10 N/kg
Moon: g = 1.6 N/kg

Question 16

Calculate the weight of a man on earth who has a mass of 73 kg

Answer 16

730 N 
(73 kg x 10 N/kg = 730 N)

Question 17

Calculate the weight of a tiger on earth who has a mass of 196 kg

Answer 17

1960 N
(196 kg x 10 N/kg = 1960 N)

Question 18

Calculate the weight of a screwdriver on earth having a mass of 0.44 kg

Answer 18

4. 4 N

0. 44 kg x 10 N/kg = 4.4 N

Question 19

Weight is the _______ of gravity due to the pull of the Earth or other objects. It is measured in _______ because it is a force

Answer 19

force
Newtons
force

Question 20

The mass of an object is how much ______ there is. Your mass does not depend on where you are and is measured in _____

Answer 20

matter

kg

Question 21

Newton said that all objects in the universe experience gravity. The size of the gravitational force depends on the ______ of the objects and the _______ between them

Answer 21

mass

distance

Question 22

If an object is taken to the Moon it weighs only about one _____ as much as it does on Earth, because the Moon is ______ than the Earth. On Jupiter the object would weigh ______, because Jupiter is ______ than Earth

Answer 22

sixth
lighter
more
heavier

Question 23

To change mass into weight on Earth you ____ by ___. To change weight on Earth into mass you ____ by ___.

Answer 23

times
10
divide
10

Question 24

To change mass into weight on the Moon you ____ by ____. To change weight on the Moon into mass you ____ by _____.

Answer 24

times
1.6
divide
1.6

Question 25

To use the weight and mass equation, the mass must be in _____

Answer 25

kg

Question 26

The weight and mass equation is:

Answer 26

w = m x g

Question 27

Gravity is a ______ force

Answer 27

pulling

Question 28

Your mass always _________ on different planets

Answer 28

stays the same

Question 29

You weight ______ on different planets

Answer 29

varies

Question 30

What is Hooke's Law?

Answer 30

When an elastic object - such as a spring - is stretched, the increased length is called its extension. The extension of an elastic object is directly proportional to the force applied to it This means if we double the force we double the extension

Question 31

What is meant by deforming an object?

Answer 31

It means changing an object's shape

Question 32

What is meant by an elastic object? | What is an example of an elastic object?

Answer 32

Elastic objects change shape when a force is exerted on them | A spring, rubber band

Question 33

What is the formula for Hooke's Law?

Answer 33

``` F = k x e F = force measured in Newtons k = the 'spring constant' measured in Newtons per metre (N/m) e = extension measured in metres ```

Question 34

A spring has a spring constant of 60 N/m. Calculate the force needed to extend it by 0.1 m

Answer 34

6 N

Question 35

The extension of an elastic object is _______ ________ to the force applied to it

Answer 35

directly proportional

Question 36

Hooke's law is a ________ relationship

Answer 36

linear

Question 37

Hooke's law only applies ______ a certain force

Answer 37

up to | For example, if a spring is stretched too much, it will not return to its original length when the load is removed