Please answer all of the following:
4.) A boy on a 2.0 kg skateboard initially at rest tosses an 8.0
kg jug of water in the forward direction. If the jug has a velocity
of 3.0 m/s and the skateboard and boy moves in the opposite
direction at 0.60 m/s, find the boys mass?
a.) 42 kg
b.) 38 kg
c.) 22 kg
d.) 10 kg
5.) High speed stroboscopic photographs show the head of a 215 g
golf club traveling at 55.0 m/s just before it strikes a 0.046 kg
golf ball at rest. After the collision the club travels 42.0 m/s.
Find the speed of the golf ball after impact.
a.) 60.7 x 10 ^ 3 m/s
b.) 607 m/s
c.) 60.7 m/s
6.) A 1500 kg car traveling at 15 m/s collides with a 4500 kg
truck that is initially at rest at a stoplight. The car and truck
stick together and move after the collision. What is the final
velocity of the combined vehicles?
a.) 15.0 m/s
b.) 11.3 m/s
c.) 3.75 m/s
d.) 0.33 m/s
7.) A dry cleaner throws a 22 kg bag of laundry onto a
stationary cart of 9.0 kg. The cart and bag begin moving at 3.0
m/s. Find the velocity if the laundry bag initially?
a.) 7.33 m/s
b.) 4.23 m/s
c.) 3.00 m/s
d,.) 1.23 m/s
8.) A 0.25 kg arrow with a velocity of 12 m/s strikes and
pierces the center of a 6.8 kg target .a. What is the final
velocity of target and arrow?
a.) 12.0 m/s
b.) 3.00 m/s
c.) 0.45 m/s
d.) 0.43 m/s
9.) A 0.25 kg arrow with a velocity of 12 m/s strikes and
pierces the center of a 6.8 kg target b. What is the change in KE
during the collision?
a.) 18.0 J
b.) 17.4 J
c.) 6.25 J
d.) .0.0622 J