Please refer to the linked URL for the picture of the figure that correlates to

Question

Please refer to the linked URL for the picture of the figure that correlates to the question (copy and paste the link): http://imgur.com/xI4iUAr

Refer to Figure 3 (linked URL) for the directions involved in these problems (PL6-PL11). Consider a scenario where the tension in the chain is 125 N. The chain is on gear #3 on the rear wheel where the radius of the gear is 4.5 cm. The diameter of the wheel is 26 inches. The wheel is in contact with the ground. The wheel is static. The rear axle is understood to be the axis of rotation for all torques.

1a. What is the direction of the torque that the chain exerts on the rear wheel?

Choices: Clockwise (into the page), Down, Left, Up, Counterclockwise (out of the page), Right?

1b. What is the magnitude of the torque that the chain exerts on the rear wheel?

Give answer in N per meter

1c. What is the direction of the torque that the ground produces on the rear wheel?

Choices: Clockwise (into the page), Down, Left, Up, Counterclockwise (out of the page), Right?

1d. What is the magnitude of the torque that the ground produces on the rear wheel?

Give answer in N per meter

1e. What is the magnitude of the frictional force that the ground exerts on the rear wheel? (We are not interested in the normal force that the ground exerts on the wheel.)

Give answer in Newtons

1f. What is the direction of the frictional force that the ground exerts on the rear wheel? (We are not interested in the normal force that the ground exerts on the wheel.)

Choices: Down, Right, Left, Up?

1g. The normal force exerted by the ground on the rear wheel points straight up, directly toward the rear axle. What is the torque produced on the rear wheel by the normal force? (Assume the normal force has a magnitude of 250 N.)

Give answer in N per meter

Explanation / Answer

1a)

Clockwise (into the page)

1b)

T*0.045 = 125 *0.045 = 5.625

1C

Counterclockwise (out of the page)

1D

T*0.045 = 125 *0.045 = 5.625 becasue wheel is static so torque  should be equal

1E

26 inch = 0.6604 meter

T * 0.045 = f* 0.6604

T = 125

so

f= 8.52 N

1F

Right

1G

zero because it will be passing from center

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