NEW
Font size
WorksheetsGravitational Acceleration Revisited
Total questions: 20
Worksheet time: 46mins
Earth's gravity, 9.8 m/s2, is considered a/an...
force
weight
acceleration
mass
The gravitational field strength outside a uniform sphere of mass Mis the same as that of a point mass Mat the centre of the sphere. The Earth, which may be assumed to be spherical and of radius r, has a gravitational field strength g at its surface. Which expression gives the gravitational field strength at height h above the ground?
g r2 / (r + h)2
g r / r + h
g (r- h) / r
g (r-h)2 / r2
Two isolated masses m1 and m2 are separated by a distance r. Which expression gives the gravitational field strength caused by m1 at m2?
G m1m2 / r
G m1 m2 / r2
G m1 / r2
G m2 / r2
What is numerically equal to the gravitational field strength at a point P on the Earth's surface?
the acceleration of free fall at P.
the change in potential energy per unit distance from P.
the force acting on any body placed at P.
the work done in bringing unit mass from infinity to P.
The acceleration of free fall on the Earth's surface may be taken to be 6 times the value on the Moon's surface. The mean density of the Earth may be taken to be 5/3 times the value of the Moon. The radius of the Earth is rE and that of the Moon is rM. What is the ratio rE / rM ?
1.9
3.6
6
10
A mass m is released just above the surface of a planet with mass M and radius R . Which expression gives its initial gravitational acceleration?
GmM / R
GmM / R3
G M / R2
GmM / 2 R
The Earth may be assumed to be spherical with mass M and radius R, with acceleration of free fall g at its surface. Which equation correctly shows how the these quantities?
G = g M / R2
G = R2 / g M
G = R2 M / g
G = M / g R2
A body of mass 20 kg mass is placed 4 m
above the Earth's surface. The value of g
may be taken as lOms-2 . What are the gravitational field strength and gravitational force acting on the body?
A
B
C
D
What is the importance of knowing the value of gravitational acceleration?
space exploration
reduce pollution
save energy
save life
What is the relationship of gravitational acceleration below the surface of the Earth and distance from the center of the Earth
directly proportional
inversely proportional
Which part of the graph shows the gravitational acceleration experiences by an object right on the surface of the Earth?
R
2R
3R
less than R
