1. How much force is needed to accelerate
a 66 kg skier at 2 m/sec2?
2. What is the force on a 1000 kg
elevator that is falling freely at 9.8 m/sec2?
3. What is the acceleration of a 50 kg
object pushed with a force of 500 newtons?
4. The mass of a large car is 1000
kg. How much force would be required to
accelerate the car at a rate of 3 m/sec2?
5. A 50 kg skater pushed by a friend
accelerates 5 m/sec2. How
much force did the friend apply?
6. A force of 250 N is applied to an
object that accelerates at a rate of 5 m/sec2. What is the mass of the object?
7. A bowling ball rolled with a force of
15 N accelerates at a rate of 3 m/sec2; a second ball rolled with
the same force accelerates 4 m/sec2.
What are the masses of the two balls?
8. If a 60 kg person on a 15 kg sled is
pushed with a force of 300 N, what will be person’s
acceleration?
9. A force of 20 N acts upon a 5 kg
block. Calculate the acceleration of the object.
10. An object of mass 300 kg is observed
to accelerate at the rate of 4 m/s2. Calculate the force
required to produce this acceleration.
11. A 5 kg block is pulled across a table
by a horizontal force of 40 N with a frictional force of 8 N opposing the
motion. Calculate the acceleration of the object.
12. An object of mass 30 kg is in free
fall in a vacuum where there is no air resistance. Determine the acceleration
of the object.
13. An object of mass 30 kg is falling in
air and experiences a force due to air resistance of 50 newtons.
a. Determine the net force acting on the
object and
b. calculate the acceleration of the
object.
14. A student pushes on a crate with a
force of 100 N directed to the right. What force does the crate exert on
the student?
15. A force of 200 N is exerted on an
object of mass 40 kg that is located on a sheet of perfectly smooth ice.
a. Calculate the acceleration of the
object.
b. If a second object identical to the
first object is placed on top of the first object, what acceleration would the
200 N force produce?
16. Just before opening her parachute a
skydiver of mass 50 kg reaches terminal velocity. Calculate the force of
air resistance.
17. For a person who has a mass 60 kg,
calculate the weight in Newtons and in pounds.
18. An object of mass 10 kg is accelerated
upward at 2 m/s2. What force is required?
