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It takes the elevator in a skyscraper 4.8 second to reach its cruising speed of 10 m/s. A 60 kilogram traveler gets aboard on the ground floor. Find the traveler's apparent weight at each of the following times?
(a) before the elevator starts moving
_____ N
(b) while the elevator is speeding up
(c) after the elevator reaches its cruising speed
A 5.00-kW motor is used to pull a 20.0-kg crate up a 15.0°-incline of length 4.00 m. At what average velocity can the motor move the crate up the incline
Explain an experimental method for determining the center of mass of any object, including irregularly shaped objects.
A uniform steel beam has a mass of 490 kg. On it is resting half of an identical beam. What is the vertical support force at each end
A uniform electric field of magnitude 2500N/C makes an angle of 27 degrees with a plane surface of area 0.355 m2. what is the net charge inside the box
Two identical point charges (q = +6.95 10-6 C) are fixed at diagonally opposite corners of a square with sides of length 0.485 m. A test charge (q0 = -2.15 10-8 C), Determine the speed of the test charge
A block lies on a horizontal frictionless surface and isattached to the free end of a spring, with a spring constant of 60N/m. What is the position of the block
A 43 kg girl and an 8.4 kg sled are on the frictionless ice of a frozen lake, 17 m apart but connected by a rope of negligible mass. What is the acceleration of the girl
question a 3.0-kg block is pulled along a frictionless surface with a force of 42n. attached to that block with a light
your car is traveling behind a jeep. both are moving at the same speed so the velocity of the jeep relative to you is
A 52.1-kg high-school student hangs from an overhead bar with both hands, What is the tension in each arm when the arms make an angle of 31.00 o with respect to the vertical
Two people start at the same place and walk around a circular lakein opposite directions. One walks with an angular speed of2.00 10-3 rad/s, while the other has an angularspeed of 3.20 10-3 rad/s. How long will it be beforethey meet?
An objects average density, p, is defined as the ration of its mass to its volume: p = M/V. The Earth's mass is 5.94x10^24 kg and its volume is 1.08x10^12 km^3
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