Section B – Physics [20 marks]
Q1
Look at the pictures. Decide whether each shows more friction or less friction. [3]
using a bathmat
1.
using rubber tyres
2.
sliding on a polished slide
4.
Q2
waxing skis
3.
oiling
5.
pulling on bicycle brakes
6.
Which forces are pushes and which ones are pulls? Write the correct words in the spaces. [2]
1._________________
2._________________
3._________________
4._________________
Q 3 Look at the pictures below. Write the names of the forces next to the arrows. [6]
A
B
_____________
D
C
_____________
E
_____________
_____________
F
_____________
_____________
Q 4 Which pictures show non-contact forces? ___________________[1]
Q 5 Complete these sentences. [ 4 ]
a
A ___________________ is needed to start an object moving.
b
A force can change the ___________________ , ___________________ and
___________________ of an object.
Q 6 An astronaut has a mass of 80 kg when he is still on the earth.
(a) given that the acceleration due to gravity on earth is 10 m/s2, calculate the weight of the astronaut. [2]
(b) he lands on moon, where the acceleration due to gravity is 1.6 m/s2. Calculate his weight on
moon. [2]