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You're using a rope to pull a sled at constant velocity across level snow,with coefficient of kinetic friction 0.050 between sled and the snow. The sled is loaded with physics books, giving a total mass of 21 kg. A) With what force should you pull with the rope horizontal? Express your answer to two significant figures and include the appropriate units. B) Repeat for the rope at 30 above horizontal. Express your answer to two significant figures and include the appropriate units.
A capacitor is connected across an ac generator whose frequency is 751 Hz and whose peak output voltage is 140 V. What is the magnitude of the maximum charge on one plate of the capacitor
A slide projector has a lens of focal length 150 mm. An image of 100 cm by 100 cm is formed of a slide whose dimensions are 50 mm by 50 mm
A uniform drawbridge must be held at a 37 angle above the horizontal to allow ships to pass underneath. What is the angular speed of the drawbridge
While exploring a cave, a spelunker starts at the entrance and moves the following distances: 75.0 m north,300 m east, Find the resultant displacement from the cave entrance
How much mass is converted to energy in H fusion and What do exoplanets (especially Hot Jupiters) tell us about planet behavior!
a ball is thrown upward from the roof of a building, passes the roof going down three seconds later, how fast did the ball strike the ground
An electric motor rotating a workshop grinding wheel at a rate of 1.10 102 rev/min is switched off, How long does it take for the grinding wheel to stop
Where does package hit the ground relative to the point
An electron has an initial velocity of 5.00 106 m/s in a uniform 9.00 105 N/C strength electric field. How long does it take the electron to come to rest
A very light rigid rod with a length of 0.692 m extends straight out from one end of a meter stick. Determine the period of oscillation of the system
90 grams of water at 80°C are mixed with an equal amount of water at 20°C in a completely insulated container. The final temperature of the water is 50°C. How much heat is lost by the hot water
In recent years, practical hybrid cars have hit the road - cars in which the gasoline engine runs a generator that charges batteries that run an electric motor. These cars offer increased efficiency, but significantly greater efficiency could be p..
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