48
Name________________________
Use Newton’s second law to solve the following problems.
1. A 1520 kg car accelerates at a rate of 1.50 m/s
2
. What is the net force on the
car?
2. A 5.22 10
7
kg cruise ship is moving at its top speed as it comes into port.
The ship then undergoes an acceleration equal to – 0.357 m/s
2
until it comes to
rest at its anchorage. What is the net force acting on the ship as it slows down?
3.A catcher in a professional baseball game exerts a force of – 65.0N to stop the
ball. If the baseball has a mass of 0.145 kg, what is the ball’s acceleration as it is
being caught?
4. As 214 kg boat is sinking in the ocean. The force of gravity that draws the
boat downward is partially offset by the buoyant force of the water, so that the
net force on the boat the boat is – 1310N. What is the acceleration of the boat?
5. A house is lifted from its foundations onto a truck for relocation. The net
force lifting the house is 2850N. This force causes the house to move from rest
to an upward speed of 0.15 m/s in 5.0 s. What is the mass of the house?
6. Because of a frictional force of 2.6N, a force of 2.8N must be applied to a
textbook in order to slide it along the surface of a wooden table. The book
accelerates at a rate of 0.11 m/s
2
.
a. What is the net force on the book?
________________________________________________________________
b. What is the mass of the book?
________________________________________________________________
Достарыңызбен бөлісу: