Physics

Question 1

Describe speed?

Answer 1

speed is rate of a change in distance.

Question 2

What is the equation for speed?

Answer 2

Speed = Distance/time

Question 3

Define acceleration?

Answer 3

Acceleration is the rate of change in speed.

Question 4

What is the equation for acceleration?

Answer 4

a = v-u/t

acceleration= final speed - initial speed/ time taken

Question 5

Define deacceleration?

Answer 5

Deacceleration is the term used to describe when an object slows down.

Question 6

If an acceleration is negative, what does this tell you?

Answer 6

That the object is deaccelerating

Question 7

What are the units for acceleration

Answer 7

M/s*2

Question 8

mass x acceleration =

Answer 8

Force

Question 9

What is velocity?

Answer 9

When something moves in a particular direction

Question 10

Define a magnetic field

Answer 10

the region around a magnet, where a pull force is in use.

Question 11

How can you show a magnetic field?

Answer 11

• the magnetic field shape can be shown by drawing the field lines: to do this you can use iron fillings.

Question 12

What happens when an insulating material is charged negatively?

Answer 12

The material gains electrons

Question 13

What happens when an insulating material is charged positively?

Answer 13

The material loses electrons

Question 14

Describe a solenoid?

Answer 14

A solenoid consists of a wire coiled up

Question 15

How can you tell which direction a current is flowing in a wire?

Answer 15

The right hand grip rule

Question 16

Nam three ways you can vary the strength of a electromagnet?

Answer 16

• Adding more coils to the solenoid
• Adding more turns to the coils
• Increasing the current.

Question 17

Define a electromagnet

Answer 17

an electromagnet is a solenoid wrapped around an iron core.

Question 18

Name 3 uses of electromagnets?

Answer 18

• scrapyard crane
• Electric bell
• loud speakers
• microphones

Question 19

_____ is the capacity to do work

Answer 19

Energy

Question 20

Work done = ____ ________

Answer 20

Energy transferred

Question 21

Describe power?

Answer 21

power is the rate of energy

Question 22

What is the equation of power?

Answer 22

Power = Energy transferred/ time taken

Question 23

What is the equation of kinetic energy?

Answer 23

0.5 x mass x speed *2

Question 24

Using the GPE equation, how would you figure out HEIGHT?

Answer 24

H = GPE/mass x gravity

Question 25

As a pendulum swings when is it the fastest?

Answer 25

When it is at the lowest point

Question 26

What is being described here?

‘chemical store, which releases energy when it is burned’

Answer 26

Fuel

Question 27

what is the energy store used for chemical substances?

Answer 27

Chemical energy