Gravitation
Physics ⇒ Mechanics
Gravitation starts at 9 and continues till grade 12.
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See sample questions for grade 9
A 10 kg object is on the surface of the Earth. What is its weight? (g = 9.8 m/s²)
A 2 kg object is dropped from a height of 10 m. What is its velocity just before hitting the ground? (g = 10 m/s²)
A 5 kg object is taken to a planet where the acceleration due to gravity is 20 m/s². What is its weight on that planet?
A 50 kg person stands on the surface of Earth. What is the gravitational force acting on the person? (g = 9.8 m/s²)
A ball is dropped from a height. What is the initial velocity of the ball?
A stone is thrown vertically upwards with a velocity of 20 m/s. How long will it take to reach the highest point? (g = 10 m/s²)
Calculate the gravitational force between two 1 kg masses placed 1 meter apart. (G = 6.67 × 10⁻¹¹ N m²/kg²)
Describe what happens to the gravitational force if both masses are doubled and the distance between them is also doubled.
Explain why astronauts feel weightless in a spacecraft orbiting Earth.
Explain why the Moon does not fall onto the Earth.
Explain why the value of g is less at the equator than at the poles.
If the mass of one object is doubled, how does the gravitational force between two objects change?
If the mass of the Earth were doubled, but its radius remained the same, what would happen to the acceleration due to gravity at its surface?
If the radius of the Earth were halved, but its mass remained the same, what would happen to the value of g at its surface?
State one reason why satellites do not fall back to Earth.
State the relationship between gravitational force and distance between two objects.
What is the difference between mass and weight?
What is the SI unit of weight?
What is the universal law of gravitation? State the formula.
Who formulated the law of universal gravitation?
