11 mark
On Mars the gravitational field strength is 4.0 N/kg.
How much would a 60 kg person weigh on Mars?
Use the equation: weight = mass × gravitational field strength
15 N
64 N
240 N
600 N
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Forces in Action (OCR Gateway GCSE Physics: Combined Science)
Topic Questions
21 mark
On the Moon the gravitational field strength is 1.6 N/kg.
Calculate the gravity force for an 80 kg astronaut.
Use the equation: gravity force = mass × gravitational field strength
50 N
128 N
800 N
1280 N
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11 mark
The graph shows the relationship between mass and weight on two different planets.
The weight of an object on planet X is 3.0 N.
What is the weight of the same object on planet Y?
1.5 N
2.0 N
4.0 N
6.0 N
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21 mark
The diagram shows 3 gears.
Gear X is rotated clockwise at 1.0 rotations per second.
Which row describes the movement of gear Z?
| Direction of rotation |
Rotations per second |
|
| A | anticlockwise | 0.5 |
| B | anticlockwise | 2.0 |
| C | clockwise | 0.5 |
| D | clockwise | 2.0 |
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11 mark
A student sets up two cogs.
Cog A has 10 teeth and cog B has 20 teeth.
Cog A is turned 2 times.
How many times does cog B turn?
0.5 times
1 time
2 times
20 times
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21 mark
A uniform 1.0 m rod is pivoted at its centre.
The rod is in equilibrium.
What is the anti-clockwise moment about the pivot?
10 N m
15 N m
40 N m
100 N m
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31 mark
An elephant has a weight of 60 kN. Its four feet have a total area of 0.75 m2 in contact with the ground.
Calculate the total pressure the elephant exerts on the ground.
Use the equation: pressure = force normal to a surface ÷ area of that surface
45 Pa
80 Pa
45 000 Pa
80 000 Pa
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