Double Physics

Question 1

Method of the physics practical

Answer 1

1. Clap the metre ruler vertically in the clamp stand as shown in the diagram
2. Flatten and even out the sand in the tray so that surface of the sand is flat

3.hold the steel ball at a height of 100cm alongside the ruler

4.drop the steel ball

5. Use a ruler to measure and record the width of the crater made by the steel ball
6. Repeat steps 2-5 another 4 times to get 5 sets of results
7. Repeat steps 2-6 dropping the steel ball from the heights of 80,60,40 and 20 cm
8. Calculate the mean values

Question 2

Give me one hazard and the risk and the control measure of the physics practical

Answer 2

Hazard: sharp sand
Risk: sand in eye when dropping ball or flattening the sand
Control measure: wear goggles and wash hands

Question 3

What is an independent variable

Answer 3

SOMTHING you change

Question 4

What is the dependent variable

Answer 4

SOMTHING you measure o

Question 5

What is a control variable

Answer 5

SOMTHING you keep the same

Question 6

What is the independent variable for the physics practical

Answer 6

Height of ball drop (cm)

Question 7

What is the dependant variable in the physics practical

Answer 7

Width of the crater (cm)

Question 8

What is the controlled variable in the physics practice

Answer 8

Size and mass of ball, volume of sand, shape of container

Question 9

State the resolution of the metre ruler in the physics practical

Answer 9

0.1 cm or 1mm

Question 10

What is the range of the dependent variable

Answer 10

Biggest take away the smallest 100-20=80

Question 11

Identify two inaccuracies in the physics investigation

Answer 11

1. Sand movement affects creator size
2. Different to detect where creator is
3. Using ruler accurately- human error
4. Accurate/ repeatable drop height

Question 12

Suggest two ways in which to improve the accuracy of the physics practical

Answer 12

Use a different material such as clay
Use a callipers to measure width
Use a pointer for drop height