Work done on the man
A 60.5-kg man is riding an escalator in a shopping mall. The escalator moves the man at a constant velocity from ground level to the floor above, a vertical height of 4.40 m. What is the work done on the man by each of the following forces?
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An object 12.0 cm tall is placed at the zero mark of a meterstick. A spherical mirror located at some point on the meterstick creates an image of the object that is upright, 4.00 cm tall, and located at the 43.0 cm mark of the meterstick. Where is
A tuner first tunes the A string very precisely by matching it to a 440 Hz tuning fork. She then strikes the A and E strings simultaneously and listens for beats between the harmonics. What beat frequency indicates that the E string is properly tu
What are key points for understanding how project costs can be estimated? What are difficulties in making cost estimates?
On a highway curve with radius 50m. What speed limit should be posted for the curve so that cars can negotiate it safely.
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What is the maximum height attained by the rocket? What is the speed of the rocket just before it hits the ground? C) What is the total duration of the rocket's flight?
What is the equation for maximum height of a bottle rocket, ignoring air resistance.
A pendulum of length 50 cm is pulled 30 cm away from the vertical axis and released from rest. What will be its speed at the bottom of its swing?
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