Question 1: A person who weighs 150 pounds rides a bicycle. The pedals move in a

Question

Question 1:

A person who weighs 150 pounds rides a bicycle. The pedals move in a circle of radius 1.4 feet. If the bikers entire weigh act son each downard moving pedal, what is the maximum torque?

Torque = ____[Num]

Question 2:

A uniform meter stick is balanced at its midpoint with a single support. A 48 N weight is suspended at the 40 cm mark. At what point must a 25 N weight be hung to balance the system?

Distance from midpoint = _____ [Num] ____[Units]

Question 3:

Two kids are playing on a teeter-totter at the park 7 feet long. If the kid on the left is 57 pounds and the kid on the right is 74 pounds. How far from the left kid should the fulcrum be placed to balance the kids?

Distance from the left child =   ____[Num] ____[Units]

Question 4:

What is the torque acting on a 14 cm wrench if the F = 93 Newtons and angle theta = 42?

Question 5:

Find the resultant torque about A in the following figure if F1 is 160 Newtons, F2 is 170 Newtons, x1 is 54 cm from A and x2 is 23 cm from A.

What is the torque acting on a 14 cm wrench if the F = 93 Newtons and angle theta = 42?

Explanation / Answer

1. Torque = r X F

hence 1.4 feet X 150 pounds = 210 pounds.feet =210 lb.ft Ans.

2.

A 48 N weight is suspended at the 40 cm mark hence The 48 N wight 10cm from the axis

We know that Total Sum of Torque (Sigma T) =0;

(48 N) * 10 cm - (25 N)x = 0

25 x=480 cm

or x=19.2 cm Ans.

3. Use the

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