Kinetics of a Particle: Work & Energy

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Questions beginning with "cont...." follow on from the previous question.

1) Determine the work done by the force when it is subjected to the displacement indicated.

U = ?

One answer only.
   0 J
   2 J
   10 J
   20 J
   None of the above

2) Determine the work done by the force when it is subjected to the displacement indicated.

U = ?

One answer only.
   0 J
   2 J
   10 J
   20 J
   None of the above

3) Determine the work done by the force when it is subjected to the displacement indicated.

U = ?

One answer only.
   2 J
   10 J
   20 J
   None of the above

4) Determine the work done by the force when it is subjected to the displacement indicated.

U = ?

One answer only.
   5 J
   5p J
   10 J
   10p J
   None of the above

5) Determine the work done by the force on the spring when it is subjected to the displacement indicated.

U = ?

One answer only.
   -50 J
   25 J
   50 J
   100 J
   None of the above

6) Determine the Kinetic energy of the 2 Kg block when it is at point A.

T = ?

One answer only.
   0 J
   2 J
   4 J
   8 J
   None of the above

7) cont....What is the kinetic energy of the block when it is at point B if it still has a speed of 2 m/s?

T = ?

One answer only.
   0 J
   2 J
   4 J
   8 J
   None of the above

8) A 2 Kg block is moving to the right at 10 m/s when it is acted upon by the 10N force. If the surface is smooth, calculate the distance d the block moves before it stops and the time it takes to stop.

d = ?

One answer only.
   0 m
   5 m
   10 m
   None of the above

9) cont...From qu 8, time taken for block to come to rest = ? secs

One answer only.
   1 s
   2 s
   4 s
   5 s
   None of the above

10) The 5 Kg block compresses the spring 2 m. If it is released from rest, determine the block's speed at the instant the spring becomes unstretched. The surface is smooth.

v = ?

One answer only.
   4 m/s
   5 m/s
   16 m/s
   20 m/s
   None of the above

11) The 10 Kg ball is released from rest at A. Select from the list the reduced form of the equation of work and energy, necessary to determine the ball's speed when it reaches point B. The cord strikes the fixed peg at C.

One answer only.
   196.2 = 5vB2
   98.1 = 5 vB2
   49.05 = 10 vB2
   98.1 = 10 vB2
   None of the above

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