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WorksheetsS3 PHY GRAVITATIONAL FIELD
Total questions: 10
Worksheet time: 21mins
What is the gravitational force between a 140 kg tree and a 798 kg Lotus Elise Sprint that are 15 m away?
6.6*10-7 N
4.8*104 N
3.3*10-8 N
7.4*1012 N
What would the gravitational force be between the Sun and Mars if they were 2.3*1011 m apart? The masses for the Sun and Jupiter are 1.99*1030 kg and 6.42*1023kg, respectively.
Fg = 3.8*1015 N
Fg = 2.8*10-42 N
Fg = 1.6*1021 N
Fg = 4.6*10-75 N
Calculate the gravitational force between a 15-kg chinchilla and a 65-kg dog which are separated by 0.30 m.
Fg = 3.7*10-8 N
Fg = 1.3*1012 N
Fg = 1.1*105 N
Fg = 7.2*10-7 N
A student drops a bowling ball and an apple from a third-story window. Both objects hit the ground at the same time. From the experiment, the student should conclude that
the apple weighs more than the bowling ball
more air friction is acting on the apple than on the bowling ball
gravity pulls on both objects, causing them to fall at the same time.
The gravitational force exerted by an object depends on its
volume
mass
weight
Which is needed to determine the amount of gravitational force between two objects?
distance and mass
weight and time
area and weight
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
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
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
