P 2.37A train is traveling down a straight track at 20 m/ s when the engineer applies the brakes, resulting in anacceleration of - 1 .0 m/s2 as long as the train is in motion. How far does the train move during a 40-s timeinterval starting at the instant the brakes areapplied?-P 2.45A ball is thrown vertically upward with a speed of 25.0 m/s. (a) How high does it rise? (b) How long dit take to reach its highest point? (c) How long does the ball take to hit the ground after it reaches itshighest point? (d) What is its velocity when it returns to the level from which it started?P 2.47A certain freely falling object, released from rest, requires 1.50s to travel the last 30.0 m before it hitsground. (a) Find the velocity of the object when it is 30.0 m above the ground. (b) Find the total distathe object travels during the fall.

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Asked Sep 11, 2019
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When I did p 2.37 I got zero but that is not the correct answer. I need help.

P 2.37
A train is traveling down a straight track at 20 m/ s when the engineer applies the brakes, resulting in an
acceleration of - 1 .0 m/s2 as long as the train is in motion. How far does the train move during a 40-s time
interval starting at the instant the brakes are
applied?
-P 2.45
A ball is thrown vertically upward with a speed of 25.0 m/s. (a) How high does it rise? (b) How long d
it take to reach its highest point? (c) How long does the ball take to hit the ground after it reaches its
highest point? (d) What is its velocity when it returns to the level from which it started?
P 2.47
A certain freely falling object, released from rest, requires 1.50s to travel the last 30.0 m before it hits
ground. (a) Find the velocity of the object when it is 30.0 m above the ground. (b) Find the total dista
the object travels during the fall.
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P 2.37 A train is traveling down a straight track at 20 m/ s when the engineer applies the brakes, resulting in an acceleration of - 1 .0 m/s2 as long as the train is in motion. How far does the train move during a 40-s time interval starting at the instant the brakes are applied? -P 2.45 A ball is thrown vertically upward with a speed of 25.0 m/s. (a) How high does it rise? (b) How long d it take to reach its highest point? (c) How long does the ball take to hit the ground after it reaches its highest point? (d) What is its velocity when it returns to the level from which it started? P 2.47 A certain freely falling object, released from rest, requires 1.50s to travel the last 30.0 m before it hits ground. (a) Find the velocity of the object when it is 30.0 m above the ground. (b) Find the total dista the object travels during the fall.

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Expert Answer

Step 1

Write the expression for distance travelled under constant acceleration

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1 S=it ar

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Step 2

Substituting the values

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Step 3

This can’t be the case. Thus, the time required for the train to co...

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+at V- t a

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