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A lunch tray is being held in one hand, as the figure illustrates. The mass of the tray itself is 0.214 kg, and its center of gravity is located at its geometrical center. On the tray is a 1.23-kg plate of food and a 0.249-kg cup of coffee. Obtain
(a) the force exerted by the thumb and
(b) the force exerted by the four fingers. Both forces act perpendicular to the tray, which is being held parallel to the ground.
A plank 2.00 cm thick and 12.4 cm wide is firmly attached to the railing of a ship by clamps so that the rest of the board extends 2.00 m, find the shear modulus of the wood
Evaluate how much work is done (including the algebraic sign) if the gas then expands from 4.0 10-3 to 6.0 10-3 m3 under isobaric conditions?
The drawing shows a uniform horizontal beam attached to a vertical wall by a frictionless hinge and supported from below at an angle ?= 36o by a brace that is attached to a pin. Find the magnitudes of these three forces
124/55 Cs has a half-life of 30.8s. If we have 5.3µg initially, how many Cs nuclei are present and What is the activity at this time
A submarine dives 90.0 m at an angle of 8.0° below the horizontal. What are the horizontal and vertical components of submarine's displacement? (Imagine that upward and the direction of the submarine's horizontal motion is positive.)
A 70-kg astronaut floating in space in a 110-kgMMU (manned maneuvering unit) experiences an acceleration of 0.029 m/s2 when he fires one of the MMU's thrusters. What is the thrust of the thruster
Two spheres are cut from a certain uniform rock. One has radius 4.30cm. The mass of the other is six times greater. Find its radius.
What is the size of the frictional force acting on the car
Starting from rest, a 5.50-kg block slides 2.00 m down a rough 30.0° incline. Determine the work done by the normal force
To correct myopia, is it necessary to move the image formed by the eye closer to or farther from the eyes lens system, Is the curvature of this lens concave or convex
A ball is thrown from the window of a high-rise building with an initial velocity of 5.1 m/s at an angle of 22 deg. below the horizontal. Find the height from which the ball was thrown
x = 2 + 3t - t^2, Where x is in meters and t is in seconds, Determine At the time is the object at rest
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