Directions: On this worksheet you will be investigating the relationships between momentum and energy.

Question 1
If F_{max} = 16 N and F_{min} = -12 N then calculate the impulse delivered to a 4-kg mass during the 5 seconds graphed above.

-14 N sec-2 N sec46 N sec34 N sec-4 N sec

Question 2
If the object's initial velocity in Question 1 was 7.9 m/sec, what will be its final velocity at the end of these 5 seconds?

7.4 m/sec-8.4 m/sec1.5 m/sec29.6 m/sec4.4 m/sec

Question 3
What was the magnitude of the average force acting on the 4-kg mass in Question 1 during the 5 seconds displayed on the graph?

-10 N-2.8 N-0.4 N2 N6.8 N

Question 4
A 7.9-gram bullet moving at 300 m/sec travels through a block of wood and emerges out the other side moving at 220 m/sec. If it takes 27.6 µsecs (1 µsec = 1 x 10^{-6} seconds) for the bullet to bore through the wood, what average force did the wood exert on the bullet?

8.59 x 10^{4} N-2.29 x 10^{4} N1.49 x 10^{6} N6.3 x 10^{4} N

Question 5
During target practice, a man shoots a 7.9-gram bullet with a horizontal velocity of 220 m/sec at a 2-kg wooden block balanced on the top of a 1.2-meter tall fence post. If the bullet embeds in the block, how fast will the block-bullet be knocked off the post?

219.13 m/sec110 m/sec0.072 m/sec0.87 m/sec

Question 6
After being knocked off, how far from the base of the fence post will the block in Question 5 hit the ground?

0.3 m0.43 m1.08 m0.21 m0.77 m

Question 7
A second 7.9-gram bullet is fired at another 2-kg block which is initially at rest on a table. The bullet embeds in the block resulting in the block sliding 171 centimeters before coming to a stop. The coefficient of friction between the block and the table's surface is µ = 0.359.How much work will the friction between the table and block do on the block while bringing it to a stop?

7.1 J12.1 J61.4 J33.6 J4.1 J

Question 8
How fast was the original bullet in Question 7 travelling before it struck the block?

Question 9
As shown in the diagrams provided below, a ball of mass 1 kg is originally moving along the x-axis with a velocity of 12 m/sec towards the origin. As it approaches the origin, it delivers a glancing blow to a stationary 2-kg mass. After the collision, the 1-kg ball continues traveling towards the left, into the second quadrant, at a reduced speed of 5 m/sec at an angle of 37º above the negative x-axis.

What is the final momentum of the 2-kg mass after the collision?

3 kg m/sec6 kg m/sec17 kg m/sec8 kg m/sec8.5 kg m/sec

Question 10
Within the system, what fraction of the 1-kg ball's original KE remains after the collision?