Forces

Question 1

If there is balanced force on the object, the object is…

Answer 1

Stationary or moving at a constant speed.

Question 2

If there are two objects travelling at the same speed, but one has a mass of 60kg and the other has a mass of 40kg which vehicle will have more friction?

Answer 2

The heavier vehicle.

Question 3

What is a force?

Answer 3

A force is a push, pull or twist.

Question 4

Is weight or mass measured by newtons?

Answer 4

Weight

Question 5

Is mass or weight measured in kilograms?

Answer 5

Mass

Question 6

If forces are acting on an object that is the same size, but act in different directions, the force is…

Answer 6

Balanced

Question 7

What force causes an object when moving through water to slow down?

Answer 7

Water resistance.

Question 8

What is a drag force?

Answer 8

A force that slows the movement of an object in the air or water.

Question 9

What is air resistance?

Answer 9

The force on an object moving in the air that causes it to slow down .

Question 10

If opposing forces on an object are unequal they are…

Answer 10

Unbalanced

Question 11

How many newtons are equivalent to 1 kg?

Answer 11

10

Question 12

What happens if the forces on a vehicle are unbalanced?

Answer 12

The vehicle will slow down or speed up.

Question 13

What is upthrust?

Answer 13

A force pushing upwards on an object in a liquid.

Question 14

What is lift?

Answer 14

A force pushing upwards on an object flying in the air.

Question 15

What is friction?

Answer 15

The force between two surfaces sliding over one another that causes them to heat up and wear.

Question 16

How do you calculate gravity from the weight and the mass?

Answer 16

Weight/mass

Question 17

Is an object heavier submerged in water or in air?

Answer 17

In air

Question 18

If you submerged an object in water, then measured its apparent weight, how would you tell if it was going to float?

Answer 18

The weight of it in water would be 0.

Question 19

If you put the same material into salt water and fresh water, in which would the material weigh less?

Answer 19

Salt water

Question 20

How do you calculate distance?

Answer 20

speed times time

Question 21

How do you calculate speed?

Answer 21

distance/ time

Question 22

How do you calculate time?

Answer 22

distance divided by speed

Question 23

What is a newton meter

Answer 23

A tool used to measure weight

Question 24

What is thrust?

Answer 24

A push caused by an engine

Question 25

Why would an object weigh more in one liquid and less in another?

Answer 25

As different liquids have different densities, therefore if you had two liquids and weighed an object in both of them, the liquid that was most dense the object would weigh the least in.

Question 26

How do you calculate density?

Answer 26

Mass of object/ volume of object

Question 27

Which two terms can you never use?

Answer 27

Fair test and valid experiment

Question 28

What is gravity?

Answer 28

A non-contact force that moves between two masses.

Question 29

What is weight?

Answer 29

A force that measures the effect gravity is having on an object

Question 30

What is mass?

Answer 30

A measurement of how much of something there is.

Question 31

6 newtons are how many grams?

Answer 31

600

Question 32

If someone walked 60 metres in 48 seconds, what is their speed (in m/s)

Answer 32

About 1.25m/s