Forces

Question 1

What are vector quantities

Answer 1

Have magnitude and direction

Question 2

What are scalar quantities

Answer 2

Only have magnitude

Question 3

What is a contact force

Answer 3

When objects are touching

Question 4

What is a non-contact force

Answer 4

When objects aren’t touching

Question 5

What is work done

Answer 5

Energy transfer

Question 6

Equation for work done

Answer 6

W=Fs

Question 7

When is an object in equilibrium

Answer 7

When the forces that are acting on it are equal

Question 8

What is elastic deformation

Answer 8

When it can return to its original shape and size

Question 9

What is inelastic deformation

Answer 9

When the object does not return to its original shape

Question 10

Equation for elastic potential energy

Answer 10

1/2 ke^2

Question 11

Equation for moment

Answer 11

M=Fd

Question 12

What is the speed of a large gear compared to a smaller gear

Answer 12

Slower

Question 13

Equation for pressure

Answer 13

P = F/A

Question 14

Equation for pressure in a liquid

Answer 14

P = hpg

p = density

Question 15

What is upthrust

Answer 15

When the force exerted on the bottom of the object is larger than the force acting from the top

Question 16

When does an object float

Answer 16

If weight = upthrust

Question 17

Equation for acceleration

Answer 17

Delta V/ T

Question 18

Equation for final velocity

Answer 18

V^2 = U^2 + 2as

Question 19

Equation for inertial mass

Answer 19

m = F/a

Question 20

What is stopping distance

Answer 20

The distance it takes a car to stop in an emergency

Question 21

What is thinking distance affected by

Answer 21

Speed
Alcohol
Drugs
Tiredness

Question 22

What is braking distance affected by

Answer 22

Speed
Weather
Tyre condition
Brake condition

Question 23

Equation for momentum

Answer 23

P = mv

Question 24

What is the momentum before compared to the momentum after

Answer 24

Equal

Question 25

Another way F = x v-u/t can be written

Answer 25

F =mv/t