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A 45.0 kg girl is standing on a 162 kg plank. The plank, originally at rest, isfree to slide on a frozen lake, which is a flat, frictionless surface. The girl begins to walk along the plank at a constant velocity of 1.44 m/s relative to the plank.
a) What is her velocity relative to the surface of the ice?b) What is the velocity of the plank relative to the surface of the ice?
A hydraulic chamber with a spring (spring constant = 1600 N/m) attached to the input piston and a rock of mass 40kg resting on the output plunger.
An irregularly shaped object 10 m long is placed with each end on ascale. If the scale on the right reads 74 N and the scale on the left reads 93 N, how far from the left is the center of gravity?
a very long solid insulating cylinder of radius a has charge distributed uniformly throughout its volume with charge
A 2150 kg satellite is in a circular orbit 780 km (780 x 103 m) above the surface of the earth. What is the gravitational force on the satellite due to the earth? What is the speed of the satellite in its orbit? What is the period of the orbit?
A satellite has a mass of 5939 kg and is in a circular orbit 4.94 × 105 m above the surface of a planet. The period of the orbit is 2.3 hours. What would be the true weight of the satellite
A paperweight, when weighed in air, has a weight of W = 6.9N.When completely immersed in water, however, it has a weight of Win water = 4.3 N. Find the volume of the paper weight
when four people with a combined mass of 320 kg sit down in a car they find that the car drops 0.50 cm lower on its
The top has a moment of inertia of 4.70 10-4 kg·m2 and is initially at rest. It is free to rotate about the stationary axis AA'. A string, wrapped around a peg along the axis of the top, is pulled in such a manner as to maintain a constant tension of..
Suppose you have a spherical balloon filled with air at room teperature and 1.0 atm pressure; its raidus is 12cm. what's the balloon's new radius
The potential difference between the surface of a 2.2cm -diameter power line and a point 1.3m distant is 3.7kV. What is the line charge density on the power line
The 6.5 kg box has acceleration to the left of 3.50 m/s^2. There is an applied force of 50 N acting on the box. Determine the magnitude of the friction acting on the box
a person who weighs 641 n is riding a 94.0 n mountain bike. suppose the entire weight of the rider and bike is
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