Name the colour of light reflected by a yellow object.
Why does a white object appear white?
What is the scientific name for the outer ear
Which piece of equipment is used to measure force?
What is the unit for area
Describe how light is detected by the eye
What is pressure?
what happens to pressure when force is spread over a large area?
what happens to pressure when force is concentrated in a small area?
Define “pressure”
State the units for pressure.
State the equation for pressure.
How do you calculate area?
How can you increase pressure?
Define “pressure”
State the units for pressure.
State the equation for pressure.
How do you calculate area?
How can you increase pressure?
A.Which of the following is the correct definition of pressure?
B.The equation that links force, pressure and are is…
C.You can increase pressure by…
A box full of clothes exerts a force of 30N and has an area on the bottom of 2m2. Calculate pressure.
A tank exerts a force of 100,000N with a pressure of 5000Pa. Calculate the area of the tank tracks
A person leaning on a desk exerts a force of 20N over an area of 0.1m2. Calculate pressure.
Spot the error
P = F x a
P = 20 x 0.1
P = 2N/m2
1. A force of 500 N acts over an area of 10 m2. Use the formula to calculate the pressure.
1. A hammer hits a nail with a force of 50 N into some wood. The area of the point of the nail is 0.02 cm2. What is the pressure the nail puts on the wood?
1. A girl has a weight of 450 N and her feet have a total area of 300 cm2. Calculate the pressure her feet put on the ground.
1. A car of weight 6,400 N has four wheels. Each wheel has an area of 80 cm2 touching the road. Find the pressure the car puts on the ground.
1. A woman weighs 650 N and wears high heels with a total area of 52 cm2. What is the pressure on the floor?
1. An elephant puts a force of 30,000 N on its four feet, which have a total area of 7,500 cm2. What is the pressure it puts on the ground?
1. A student uses a glue stick with an area of 4 cm2, putting a pressure of 0.5 N/cm2 on her book. Calculate the force she puts on the glue stick.
1. A box puts a pressure of 50 N/m2 on an area of 0.25 m2. Find the force of the box on the floor.
1. Calculate the area of a dart which hits the dartboard with a force of 10 N and pressure of 2000 N/cm2.
1.Give the equation to find force.
1.Give the equation to find pressure.
1.A water bottle placed on a desk has an area of 0.5m2with a pressure on the desk of 10N. Calculate the force.
: A table weighs 1000N and has 4 legs, each with a surface area of 0.05m2 a) find the pressure the table exerts on the ground
b) Find the pressure if 4 extra legs are added