An auto is coasting on a level road. It weighs 10. kN. How much work is done by gravity as it moves horizontally 150. meters?
What will be an ideal response?
zero (displacement is perpendicular to the force)
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A box slides down a frictionless plane inclined at an angle ? above the horizontal. The gravitational force on the box is directed
A) parallel to the plane in t he same direction as the movement of the box. B) parallel to the plane in the opposite direction as the movement of the box. C) perpendicular to the plane. D) vertically. E) at an angle ? below the inclined plane.
General Questions: If you pound a feather with a hammer, which one feels a greater force?
A. always the feather B. always the hammer C. The size of the force is always exactly the same on both of them. D. If the feather moves, then it felt the greater force. Otherwise the force was the same on both.
Fluid Flow: Ideal incompressible water flows through a horizontal pipe of cross-sectional area 10.0 cm2 at a pressure of 0.250 atm with a volume flow rate of 1.00 × 10-3 m3/s. At a valve, the effective cross-sectional area of the pipe is reduced to 5.00 cm2. What is the pressure at the valve?
A. 0.112 atm B. 0.157 atm C. 0.200 atm D. 0.235 atm
Based on its orbit, give two reasons to revoke Pluto's planetary status
What will be an ideal response?