Superman must stop a 105-km/h train in 160 m to keep it from hitting a stalled car on the tracks. The train's mass is 3.6 x 105 kg. Determine the force that must be exerted on the train. Express your answer to two significant figures and include the appropriate units. Enter positive value if the direction of the force is in the direction of the initial velocity and negative value if the direction of the force is in the direction opposite to the initial velocity. ? FTs = Value Units Submit Request Answer Part B Compare the magnitudes of the force exerted on the train and the weight of the train (give as %). Express your answer using two significant figures. FTS %3D mg

University Physics Volume 1
18th Edition
ISBN:9781938168277
Author:William Moebs, Samuel J. Ling, Jeff Sanny
Publisher:William Moebs, Samuel J. Ling, Jeff Sanny
Chapter5: Newton's Law Of Motion
Section: Chapter Questions
Problem 23P: While sliding a couch across a floor, Andrea and Jennifer exert forces FA and FJ on the couch....
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Superman must stop a 105-km/h train in 160 m
to keep it from hitting a stalled car on the tracks.
The train's mass is 3.6 x 105 kg.
Determine the force that must be exerted on the train.
Express your answer to two significant figures and include the appropriate units. Enter positive value if the
direction of the force is in the direction of the initial velocity and negative value if the direction of the force is in
the direction opposite to the initial velocity.
?
FTs =
Value
Units
Submit
Request Answer
Part B
Compare the magnitudes of the force exerted on the train and the weight of the train (give as %).
Express your answer using two significant figures.
FTs
%
%3D
mg
Transcribed Image Text:Superman must stop a 105-km/h train in 160 m to keep it from hitting a stalled car on the tracks. The train's mass is 3.6 x 105 kg. Determine the force that must be exerted on the train. Express your answer to two significant figures and include the appropriate units. Enter positive value if the direction of the force is in the direction of the initial velocity and negative value if the direction of the force is in the direction opposite to the initial velocity. ? FTs = Value Units Submit Request Answer Part B Compare the magnitudes of the force exerted on the train and the weight of the train (give as %). Express your answer using two significant figures. FTs % %3D mg
Part C
How much force does the train exert on Superman?
Express your answer to two significant figures and include the appropriate units. Enter positive value if the
direction of the force is in the direction of the initial velocity and negative value if the direction of the force is in
the direction opposite to the initial velocity.
?
FST =
Value
Units
Transcribed Image Text:Part C How much force does the train exert on Superman? Express your answer to two significant figures and include the appropriate units. Enter positive value if the direction of the force is in the direction of the initial velocity and negative value if the direction of the force is in the direction opposite to the initial velocity. ? FST = Value Units
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