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WorksheetsPhysics Form 4 Part 2
Total questions: 15
Worksheet time: 24mins
The acceleration of gravity on the Moon is almost 6 times less than on earth. If the weight of the astronaut on Earth is 850 N, what is his mass on the Moon
[Gravitational field strength of Earth = 9.81 m s-2]
14.17 kg
85.00 kg
86.65 kg
141.67 kg
Which statement is TRUE to explain Newton’s Universal Law of Gravitation?
Gravitational force is a gravitational constant
The force of gravity increase linearly to the product of the mass of two bodies
Gravitational force can be an attractive force or a repulsive force
The force of gravity is inversely proportional to the square of the distance between the centers of the two bodies
The gravitational attraction between the two bodies increases when their ...
masses are reduced and distance reduced
masses are increased and distance reduced
masses are reduced and distance is increased
masses are increases and distance is increased
Two protons of mass 1.67 x 10-27 kg separated by 1.4 x 10-14 m.
Calculate the attraction force between the protons.
6.67 x 10-23
7.96 x 10-24
9.49 x 10-37
1.42 x 10-48
What is the gravitational force of the sun on a 15.0 kg box on the Earth's surface when the Sun's mass is 2.0 x 1030 kg and the distance between Earth and Sun 1.5 x 1011 m?
8.9 x 10-2 N
4.5 x 10-1 N
9.2 x 102 N
4.0 x 105 N
The weight an object on the surface on the Earth is 100 N.
What is the attraction force between the object and the Earth?
0 N
10 N
100 N
1 000 N
A man made satellite orbits the Earth at a distance of 1.45 × 104 km from Earth’s center. The moon orbits the Earth at a distance of 3.84 × 105 km once every 27.3 days.
How long does it take the satellite to orbit the Earth?
0.20 days
3.07 days
243 days
3721 days
What is the force required to keep a 10 kg model train moving in a circle of radius 5 m when the train has a linear speed of 0.4 m s-1?
0.08 N
0.80 N
0.20 N
0.32 N
The frictional force between the wheels and the surface of the road is 1000 N , when the car moves in a roundabout with a linear speed 15 km h-1.
What is the linear speed of the car when the frictional force between the wheels and the surface of the road is 4000 N.
8 km h-1
15 km h-1
30 km h-1
60 km h-1
The diagram shows a merry-go-round at a playground with a radius of 5 m. The linear speed of the merry-go-round is 4 m s-1.
What is the centripetal acceleration of the merry-go-round?
3.20 m s-2
1.25 m s-2
0.80 m s-2
0.16 m s-2
Period of revolution of the Moon orbiting around the Earth is 2.36 x 106 s, and the radius of Moon’s orbit is 3.83 x 108 m.
Calculate the mass of the earth.
[ G = gravitational constant = 6.67 x 10-11 Nm2 kg-2 ]
1.62 x 1021 kg
5.97 x 1024 kg
6.03 x 1024 kg
9.04 x 1025 kg
Which of the following is TRUE regarding the statement of Kepler’s second law?
A line joining two planets sweeps equal areas in equal times
A line between the sun and the planet sweeps equal areas in equal times
A line joining two planets sweeps equal arc lengths in equal times
A line between the sun and the planet sweeps arcs length in equal times
Diagram shows the orbit of the Earth when rotates about the sun, S as its focus.
At which point velocity of the Earth is maximum?
W
X
Y
Z
Satellite M is 4 times farther from a planet than satellite N. When the satellite M takes 20 weeks to complete a full orbit around the planet, how long will the
satellite N to travel around the planet once?
2 weeks
2.5 weeks
4 weeks
4.5 weeks
A satellite orbiting Earth with a linear orbital speed.
Which of the following physical quantities does not affect linear orbital speed?
Mass of Earth
Mass of satellite
Gravitational constant
Radius of orbit
