The contestant now pulls the block of ice with a ropeover his shoulder at the same angle above thehorizontal as shown below. The coefficient of frictionof ice can be found in Table 6.1. Calculate theminimum force F he must exert to get the blockmoving. (b) What is its acceleration once it starts tomove, if that force is maintained?| 25° SystemStatic Friction usKinetic Friction ukRubber on dry concrete1.00.7Rubber on wet concrete0.5-0.70.3-0.5Wood on wood0.50.3Waxed wood on wet snow0.140.1Metal on wood0.50.3Steel on steel (dry)0.60.3Steel on steel (oiled)0.050.03Teflon on steel0.040.04Bone lubricated by synovial fluid0.0160.015Shoes on wood0.90.7Shoes on ice0.10.05Ice on ice0.10.03Steel on ice0.40.02Table 6.1 Approximate Coefficients of Static and Kinetic Friction

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The contestant now pulls the block of ice with a rope over his shoulder at the same angle above the horizontal as shown below. The coefficient of friction of ice can be found in Table 6.1. Calculate the minimum force Fhe must exert to get the block moving. (b) What is its acceleration once it starts to move, if that force is maintained? | 25°

The contestant now pulls the block of ice with a rope over his shoulder at the same angle above the horizontal as shown below. The coefficient of friction of ice can be found in Table 6.1. Calculate the minimum force Fhe must exert to get the block moving. (b) What is its acceleration once it starts to move, if that force is maintained? | 25°

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Newton's Second Law

Newton’s laws of motion describe the relationship between the motion of an object and forces acting on it. Newton’s law of motion has two types as follows:

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The contestant now pulls the block of ice with a rope
over his shoulder at the same angle above the
horizontal as shown below. The coefficient of friction
of ice can be found in Table 6.1. Calculate the
minimum force F he must exert to get the block
moving. (b) What is its acceleration once it starts to
move, if that force is maintained?
| 25°

System
Static Friction us
Kinetic Friction uk
Rubber on dry concrete
1.0
0.7
Rubber on wet concrete
0.5-0.7
0.3-0.5
Wood on wood
0.5
0.3
Waxed wood on wet snow
0.14
0.1
Metal on wood
0.5
0.3
Steel on steel (dry)
0.6
0.3
Steel on steel (oiled)
0.05
0.03
Teflon on steel
0.04
0.04
Bone lubricated by synovial fluid
0.016
0.015
Shoes on wood
0.9
0.7
Shoes on ice
0.1
0.05
Ice on ice
0.1
0.03
Steel on ice
0.4
0.02
Table 6.1 Approximate Coefficients of Static and Kinetic Friction

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