3.

If pressure is measured in pascals, Pa, and force in newtons, N, then area is measured in ....... 

[ ] 
cm^{2} 
[ ] 
km^{2} 
[ ] 
m^{2} 
[ ] 
mm^{2} 


4.

If pressure increases then ....... 

[ ] 
force and area are doubled 
[ ] 
force and area are halved 
[ ] 
force increases or area decreases 
[ ] 
force increases or area increases 


5.

A box weighs 100 N. The area of the box on the ground is 20 m^{2}. What is the pressure of the box on the ground? 

[ ] 
0.02 Pa 
[ ] 
5 Pa 
[ ] 
50 Pa 
[ ] 
2,000 Pa 


6.

A box weighs 60 N. The dimensions of the base are 3 m by 2 m. What is the pressure of the box on the ground? 

[ ] 
10 Pa 
[ ] 
12 Pa 
[ ] 
20 Pa 
[ ] 
30 Pa 


7.

A sheet of metal in a factory weighs 60 N. Its dimensions are 2 m by 1 m. What is the pressure it puts on the ground? 

[ ] 
6 Pa 
[ ] 
20 Pa 
[ ] 
30 Pa 
[ ] 
60 Pa 


8.

A student weighs 600 N. The area of one foot is 0.01 m^{2}. If she stands on two feet what is the pressure on the ground? 

[ ] 
300 Pa 
[ ] 
6,000 Pa 
[ ] 
30,000 Pa 
[ ] 
60,000 Pa 


9.

The dimensions of the base of a box are 80 cm by 100 cm. It weighs 400 N. What is the pressure on the ground? 

[ ] 
50 Pa 
[ ] 
80 Pa 
[ ] 
400 Pa 
[ ] 
500 Pa 


10.

The size of an African elephant's foot is 40 cm by 50 cm. The elephant weighs 64,000 N. When standing on the ground, what is the pressure it exerts? 

[ ] 
40,000 Pa 
[ ] 
80,000 Pa 
[ ] 
240,000 Pa 
[ ] 
300,000 Pa 

