Area, Volume, Density, Speed, Velocity And Acceleration

Question 1

What is area?

Answer 1

The area of a shape is the amount of surface enclosed within its boundaries

Question 2

What is volume?

Answer 2

The amount of space an object takes up

Question 3

How do you measure volume of a solid?

Answer 3

Length x width x height

Question 4

How do you measure the volume of an irregular shaped object?

Answer 4

1. Fill an overflow can with water to a point above the the spout and wait until the water stops dripping from the spout
2. Lower a stone into the overflow can
3. Measure the volume of liquid displaced into a measuring cylinder to find the volume of the stone

Question 5

What is the density, mass, volume triangle?

Answer 5

Monkeys drink vodka

    Mass Density x Volume

Question 6

What is the distance, speed, time triangle?

Answer 6

Dad’s silly triangle

Distance Speed x Time

Question 7

What is velocity?

Answer 7

An objects speed in a certain direction

Question 8

How do you calculate acceleration?

Answer 8

Time taken

Question 9

What is force?

Answer 9

Something that causes an object to accelerate

Question 10

What is force measured in?

Answer 10

Newton

N

Question 11

What is weight?

Answer 11

The force of gravity on an object

Weight (in newtons) =
Mass (in kilograms) x10

Question 12

What is friction?

Answer 12

The force which opposes motion between two objects in contact

Question 13

Give 3 advantages and 3 disadvantages of friction

Answer 13

-Advantages
Brakes
To move (like in with car tyres)
To pick things up

-Disadvantages
Slows things down
Waste of energy
Wears away surfaces

Lubrication reduces friction

Question 14

How do you investigate the relationship between the extension of a spiral spring and the force applied to it?

Answer 14

1. Hang a natural, unstretched spring to a retort stand and measure its length
2. Attach a weight, measure the new length of the spring and calculate the extension by subtracting the current length from the initial length
3. Continuing adding weights to the hanger and calculating the extension
4. Graph the extension against the stretching force (weight)
5. The graph should be a straight line going through (0,0) showing the extension is directly proportional to the force which caused it

Question 15

What is Hooke’s Law?

Answer 15

The extension of a spring is directly proportional to the force that is stretching it

Question 16

What is the formula for work done?

Answer 16

Force x distance moved

Question 17

What is energy?

Answer 17

The ability to do work

Question 18

What is power and how is it calculated?

Answer 18

Power is the work done per unit time

Power = work done ➗ time taken