Physics Plus (Section 4) Kinematics Problem Solving

brontidegrrrMechanics

Nov 14, 2013 (3 years and 10 months ago)

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Physics Plus (Section 4)

Kinematics Problem Solving


These problems are straightforward kinematics problems. Use the problem solving
process to describe the situations and solve, showing all work. Use g = 10 m/s
2
.



1.

Peter Rosendahl rode his unicycle a di
stance of 100 m in 12.11 s.
If Rosendahl started at rest, what was the magnitude of his
acceleration?


2.

Sam goes sledding down a 20 m long hill, starting at rest. If he
accelerates at a rate of 3 m/s
2
, how long will it take to get to
the bottom? (3.7 s)



3.

Brad is running down the basketball court starting at 10 m/s. If
the basket is 5 m away, and it takes him 5 s to get there, what
is his acceleration? (
-
3.6 m/s
2
)



4.

The velocity of a car decreases as it travels down a hill that
points down and to the left.

Initially it travels at speed 9.0
m/s and 20 m further down the hill the car’s speed is 4.0 m/s.
Determine the acceleration of the car.(
-
1.6 m/s
2
)



5.

A car accelerates from 15 m/s to 30 m/s in 4.0 s. How far did
the car travel? (90 m)



6.

An automobile th
at set the world record for acceleration
increased speed from rest to 27 m/s in 3.07 s. How far had the
car traveled by the time the final speed was achieved?


7.

A car starts to move with increasing speed from rest. The car
accelerates at 2 m/s
2

until reachi
ng a maximum speed of 20 m/s.
How far does it travel? (100 m)



8.

The skid marks left by the decelerating jet
-
powered car
The
Spirit of America

were 9.60
km

long. If the car’s acceleration
was
-
2.00 m/s
2
, what was the car’s initial velocity?


9.

A kid goes dow
n a slide, accelerating at 1m/s
2

for 3s. If he
starts at rest, how long is the slide?(4.5m)


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10.

Starting from rest, a horse runs from the starting line to
the finish, 100 m away. If it takes 10 s to finish the race,
what is the acceleration of the horse? (2

m/s
2
)