Answer:60 ohms
Explanation:
This is a series connection
Total resistance=30+15+15
Total resistance=60
Total resistance=60 ohms
Answer:
Explanation:
Work is given by the equation where is force and is displacement.
Displacement is defined as change in position. In this case, the box moves from 5m to 20m. Its displacement is .
The force acting on the box is the force of gravity, given as .
Therefore, the total work done is:
(two significant figures).
Answer: MA = 5
Explanation:
The mechanical advantage is the ratio of the load to the effort. It is a measure of how efficient a simple machine is.
MA = Load/Effort
Load = 35N
Effort = 7N
Therefore
MA = 35N/7N
MA = 5
Since the mechanical advantage is more than 1, the lever is highly efficient as it allows a very small effort to overcome 5 times its magnitude of load.
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