Traveling at a speed of 15.5 m/s, the driver of an automobile suddenly locks the wheels by slamming on the brakes. The coefficient of kinetic friction between the tires and the road is 0.750. What is the speed of the automobile after 1.10 s have elapsed? Ignore the effects of air resistance.

Friction

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others
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University
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Hard
Dinesh K
Used 1+ times
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10 questions
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1.
OPEN ENDED QUESTION
30 sec • 1 pt
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2.
OPEN ENDED QUESTION
30 sec • 1 pt
A person is trying to judge whether a picture (mass = 1.30 kg) is properly positioned by temporarily pressing it against a wall. The pressing force is perpendicular to the wall. The coefficient of static friction between the picture and the wall is 0.585. What is the minimum amount of pressing force that must be used?
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3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Statement1: It takes much longer time and covers more distance to stop a moving ship in water than a moving car with same speed on the road.
Statement2: The friction on water surface is much less than the solid surface.
Both statements 1 and 2 are true and statement 2 is the correct explanation of statement 1.
Both statements 1 and 2 are true but statement 2 is not the correct explanation of statement 1.
Statement 1 is true but statement 2 is false.
Statement 1 is false but statement 2 is true.
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
THE MEASUREMENT OF THE AMOUNT OF FRICTION A SURFACE WILL GENERATE IS CALLED THE '_________ OF FRICTION'.
CALIBRATION
COEFFICIENT
SMOOTHNESS
DESCRIPTION
FACT
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
is present as a body slides over another surface.
Sliding Friction
Starting Friction
Friction
Rolling Friction
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the Newton's 2nd Law of Motion?
equal and opposite reations
law of inertia
law of gravity
f = ma
7.
MULTIPLE CHOICE QUESTION
30 sec • 2 pts
A
B
C
D
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