11. Exercises

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b) What can you deduce about the forces that the beam exerts on the supports?
b) What can you deduce about the forces that the beam exerts on the supports?
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</div>{{#NAVCONTENT:Answer a|Answer 11.2a|Answer b|Answer 11.2b}}
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</div>{{#NAVCONTENT:Answer a|Answer 11.2a|Answer b|Answer 11.2b}}
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===Exercise 11.3===
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A ball is dropped and bounces on a horizontal surface. Describe how the force that the surface exerts on the ball varies during the bounce. Also describe how the force that the surface exerts on the ball varies.
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</div>{{#NAVCONTENT:Answer|Answer 11.3}}
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===Exercise 11.4===
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A concrete block, of mass 5 kg, is placed in a bucket of mass 1 kg. A rope is used to pull the bucket vertically upwards. At one point the block and bucket accelerate upwards at 0.2 <math>\text{m}{{\text{s}}^{-2}}</math>.
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a) Find the tension in the rope.
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b) Find the magnitudes of the forces that the bucket exerts on the concrete block.
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c) State the magnitude of the force that the block exerts on the bucket.
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</div>{{#NAVCONTENT:Answer|Answer 11.4|Solution a|Solution 11.4a|Solution b|Solution 11.4b|Solution c|Solution 11.4c}}

Revision as of 14:29, 17 September 2009

       Theory          Exercises      


Exercise 11.1

As a ball bounces on a table, the table exerts a upward normal reaction force on the ball. Describe the reaction to this force..

Answer
Answer 11.1



Exercise 11.2

A beam rests in equilibrium on two supports.

a) Draw a diagram to show the forces that act on the beam.

b) What can you deduce about the forces that the beam exerts on the supports?

Answer a
Answer 11.2a
Answer b
Answer 11.2b


Exercise 11.3

A ball is dropped and bounces on a horizontal surface. Describe how the force that the surface exerts on the ball varies during the bounce. Also describe how the force that the surface exerts on the ball varies.

Answer
Answer 11.3


Exercise 11.4

A concrete block, of mass 5 kg, is placed in a bucket of mass 1 kg. A rope is used to pull the bucket vertically upwards. At one point the block and bucket accelerate upwards at 0.2 \displaystyle \text{m}{{\text{s}}^{-2}}.

a) Find the tension in the rope.

b) Find the magnitudes of the forces that the bucket exerts on the concrete block.

c) State the magnitude of the force that the block exerts on the bucket.

Answer
Answer 11.4
Solution a
Solution 11.4a
Solution b
Solution 11.4b
Solution c
Solution 11.4c
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