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In each of the diagrams below, one or more external forces act on the indicated system. Which of the forces listed below are the reaction to the external force mentioned? (Select all that apply.)
(a) the mower exerts a force
upward on the Earth due to gravitational attraction
downward on the ground due to contact
downward on the Earth due to gravitational attraction
upward and to the left on the handle
upward on the ground due to contact
a horizontal beam of electrons travels from north to south in a discharge tube where the earth has a downward component
Three objects lie in the x, y plane. Each rotates about the z axis with an angular speed of6.42 rad/s. Obtain the moment of inertia of the system
the inside of a room is to be maintained at 20 degrees celsius while the outside temperature is -10 degrees celsius.
A loudspeaker of mass 25.0 is suspended a distance of = 2.20 below the ceiling by two cables that make equal angles with the ceiling. What is the tension in each of the cables
Two tugboats pull a disabled supertanker. Each tug exerts a constant force of 2.20×106 N , What is the total work done by the two tugboats on the supertanker
Astronomers discover a binary star system that has a period of 93.0 days. The binary star system consists of two equal-mass stars, each with a mass twice that of the sun, that rotate like a dumbbell about the centre of mass at the midpoint between..
a student m 97 kg runs at a velocity vi 2.85 ms before jumping on a skateboard. after jumping on the board the
A pile driver falls through a distance of 1.75m before hitting a pile. Find the velocity of the driver as it hits the pile
Energy is transferred to a block of wood by a force at a rate given by: Compute the maximum power delivered to the block and when it occurs.
Water flows at 0.25L/s through a 7.0-m-long garden hose 2.0cm in diameter that is lying flat on the ground. What is the gauge pressure of the water where it enters the hose
In a ballistics test, a 25 g bullet traveling horizontally at 1200m/s goes through a 30 cm thick 350 kgstationary target and emerges with a speed of 900 m/s. What average force does it exert on the target
A pyramid has a height of 530 ft and its base covers an area of 15.0 acres. The volume of a pyramid is given by the expression V = 1 3 Bh, Find the volume of this pyramid in cubic meters
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