Question
What is weight?
a frictional force
a magnetic force
a gravitational force
an electromagnetic force
Answer/Explanation
Ans: C
Question
The diagram shows a bird in flight. The bird is flying in a horizontal direction to the right.
In which direction does air resistance act on the bird?
Answer/Explanation
Ans: D
Question
A rocket is travelling vertically upwards. Three vertical forces act on it.
The thrust acts upwards and is equal to 100 000 N. The weight acts downwards and is equal to 80 000 N.
What is the air resistance force acting on the rocket when it is travelling upwards at constant speed?
20 000 N downwards
20 000 N upwards
180 000 N downwards
180 000 N upwards
Answer/Explanation
Ans: A
Question
On Mars, the acceleration of free fall g is 3.7 m /s2.
What is the weight of a 2.0 kg mass on Mars?
A 0.54 N
N B 1.9 N
C 7.4 N
D 20 N
Answer/Explanation
Ans: C
Question
The diagram shows a solid object on a flat surface, with two forces acting on the object.
What is the resultant force on the object?
A 1 N to the left
B 1 N to the right
C 7 N to the left
D 7 N to the right
Answer/Explanation
Ans: B