Principle of Linear Impulse and Momentum

Select the answer for each of the following questions, then press "Mark" at the bottom of the page to receive feedback.
A pen and paper may be required to assist in the answering of some questions.
Questions beginning with "cont...." follow on from the previous question.

1) The force F acts for 2 s. Compute the magnitude of the impulse given to the 10-kg block.

I = ?

One answer only.
   20 Ns
   35 Ns
   40 Ns
   None of the above

2) The force F acts for 2 s. Compute the magnitude of the impulse given to the 10-kg block.

I = ?

One answer only.
   5 Ns
   15 Ns
   20 Ns
   None of the above

3) Compute the magnitude of the block's linear momentum when the block is at point A. The block has a mass of 10 kg and moves along the vertical curved path with a constant speed of 2 m/s.

LA = ?

One answer only.
   17 kg.m/s
   20 kg.m/s
   25 kg.m/s
   None of the above

4) cont....What is the magnitude of the linear momentum of the block when it is at point B?

LB = ?

One answer only.
   5
   15
   25
   None of the above

5) The 2 kg block is moving to the right at 10 m/s when it is acted upon by the 10-N force. If the surface is smooth, determine the time needed to stop the block.

t = ?

One answer only.
   2 s
   3.5 s
   4.5 s
   None of the above

6) The 10 kg block is sliding down the plane at 2 m/s when it is at A. Select the equation which represents a reduced form of the principle of impulse and momentum in the x direction for the time period t = 2 s. The coefficient of kinetic friction between the block and plane is m = 0.4.

One answer only.
   20 - 0.8 NA = 10 v
   118.1 - 0.8 NA = 10 v
   None of the above

7) The 10 kg ball rolls to the left at 3 m/s, it strikes the wall and bounds back and rolls to the right at 2 m/s. If the contact time is 0.1 s, determine the average impulsive force which the wall exerts on the ball.

F = ?

One answer only.
   100 N
   200 N
   300 N
   500 N
   None of the above

8) The 10 kg block is moving to the right at 3 m/s when it is acted upon by the force F which varies as shown. Select the equation that represents a reduced form of the principle of impulse and momentum in the x direction during the time period t = 5 s. The coefficient of kinetic friction between the block and the plane is mK = 0.4.

One answer only.
   90 - 2 NA = 10v
   110 - 2 NA = 10v
   10 + 2 NA = 10v
   None of the above

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