# physics

A woman pushes a lawn mower with a con-
stant force of 112 Newtons at an angle of
37� with respect to the horizontal. The lawn
mower moves at a speed of 20 cm/sec.
What is her power output? (1 hp = 746
Watts)
1. 0.040 hp
2. 0.024 hp
3. 0.034 hp
4. 0.020 hp
5. 0.030 hp
6. 0.044 hp

1. 0
2. 0
3. 9
1. horizontal force = 112 cos 37
speed = .2 m/s
power = 112 cos 37 * .2 = 17.9 Watts
17.9/746 = 0.024 Hp

1. 0
2. 0
posted by Damon

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