Transcript Acceleration Review - Ms. Cummings Homepage

Acceleration Review
Acceleration
1. A girl can row a boat at a speed of
5 km/h in still water. The girl
heads across a river that is 25
km wide. What is the boat's
velocity in m/s? How long will it
take her to cross the river?
Acceleration
2. If a ball is dropped and attains a
velocity of 29.31 m/s in a time
interval of 3 sec on another
planet, what is the acceleration
of gravity on this planet?
Acceleration
3. A large rock is dropped from a
bridge into the river below. If the
time required for it to drop is 1.7
sec, with what speed does it hit
the water?
Acceleration
4. A runner accelerates from rest at
a rate of 1.40 m/s2 over a time
interval of 8 sec. What is his final
velocity? How far did he travel?
Acceleration
5. A car traveling at 4 m/s, south,
accelerates at 5 m/s2 over a
displacement of 114 m, south.
What is his final velocity?
Acceleration
6. A woman on a motorcycle moving
uniformly at a rate of 60 m/s passes a
truck at rest. At the instant the
motorcycle passes the truck, the
truck begins to accelerate at the rate
of 4 m/s2. How long does it take the
truck to catch up to the motorcycle?
How far has the motorcycle traveled?
What is the truck's speed at this
point?
Acceleration
7. What is the acceleration of the
object in the graph at these exact
times: 2 sec, 5 sec; 7 sec, and 14
sec?
Acceleration
8. Which has the greater
acceleration: a car that increases
it speed from 50 to 60 km/h, or a
bike that goes from 0 to 10km/h
in the same time? Explain
Acceleration
9. An object with an initial velocity of 4
m/s moves along a straight axis
under constant acceleration. Three
seconds later, its velocity is 14 m/s.
How far did it travel during this time.
Acceleration
10. A car that’s initially traveling 10
m/s accelerates uniformly for 4
seconds at a rate of 2 m/s2, in a
straight line. How far does the
car travel during this time?
Acceleration
11. A rock is dropped off a cliff that’s
80 m high. If it strikes the ground
with an impact velocity of 40 m/s,
what acceleration did it
experience during its descent?