Work and Energy
1. Which of the following situations does not show any work
being done on the object?
a) Lifting a bucket.
b) Pulling a wagon.
c) Stretching a rubber band.
d) Holding a barbell overhead.
Impulse and Momentum
1. A 50.0-kg football player is running East at 1.20 m/s. What is his
p = mv = (50.0 kg)(1.20 m/s [East]) = 60.0 kg.m/s [East]
2. A 5.00-kg object is moving North at 12.0 m/s, w
If the surface between Block A
and the table is frictionless, what
is the acceleration of each block?
FN = 30 N
The pulley is frictionless and
the ropes have insignificant
mA = 3.00
Forces at an Angle
A 4.0 kg block is sitting on incline
which has an angle of elevation
of 25 as shown at the right.
1. If the incline is frictionless, what is the acceleration of the
block when it is rele