1 Identical marbles are released from the same height on each of the following f

Question

1 Identical marbles are released from the same height on each of the following four frictionless ramps.

Compare the speed of the marbles at the end of each ramp. Explain your reasoning.

2A force of only 150 N can lift a 600 N sack of flour to a height of 0.50 m when using a lever as shown in the diagram below.

a Find the work done on the sack of flour (in J).

b Find the distance you must push with the 150 N force on the left side (in m).

c Briefly explain the benefit of using a lever to lift a heavy object.

3 Rank the following in terms of increasing power.

Doing 100 J of work in 10 seconds.

Doing 100 J of work in 5 seconds.

Doing 200 J of work in 5 seconds.

Doing 400 J of work in 30 seconds.

Explanation / Answer

1 Identical marbles are released from the same height on each of the following f

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