Question

5. A wheelbarrow has a 125 kg load located 0.80 m from the fulcrum. An effort force of 650 N is needed to lift the handles of the wheelbarrow. a. Draw a diagram of the lever, labelling the fulcrum, the associated forces and the distances involved. ( 2 marks) b. What class lever is the wheelbarrow? (1 mark) c. Calculate the magnitude of the load force. ( 3 marks) d. Calculate the distance from the fulcrum to the effort force. ( 3 marks)

Answer 1

a. The diagram of the lever can be drawn as follows: b. The wheelbarrow is a class 2 lever. c. The magnitude of the load force is 650 N. d. The distance from the fulcrum to the effort force is 0.154 m.

Step-by-step explanation:

a. The diagram of the lever can be drawn as follows:

b. The wheelbarrow is a class 2 lever. In a class 2 lever, the load is located between the fulcrum and the effort force. In this case, the load is the weight in the wheelbarrow.

c. To calculate the magnitude of the load force, we can use the formula:

Load Force = Effort Force x Effort Arm / Load Arm

Load Force = 650 N x 0.80 m / 0.80 m = 650 N

Therefore, the magnitude of the load force is 650 N.

d. The distance from the fulcrum to the effort force can be calculated using the formula:

Effort Arm = Load Force x Load Arm / Effort Force

Effort Arm = 125 kg x 0.80 m / 650 N = 0.154 m

Therefore, the distance from the fulcrum to the effort force is 0.154 m.

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