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A sled of mass m is being pulled by a constant horizontal force of magnitude F. The coefficient of kinetic friction is Uk. During the time interval delta t=t, the sled moves a distance s , starting from rest.
A) find the work W done by force F.
B) find the power average created by force.
C) find the power average created by force F at t=10s.
A 0.80 kg framed picture hangs by a light wire on a nail. The 50 cm long wire is attached to both ends of the 40 cm wide picture frame, What is the tension in the wire
If a 37.2N horizontal force must be applied to slide a 15.8kg box along the floor at constant velocity what is the coefficient of sliding friction between the two surfaces.
Two charges of equal magnitude exert an attractive force of 3.0×10-4 N on each other. how far apart are the charges
When a 29.0-V emf device is placed across two resistors in series, a current of 10.0 A is flowing in each of the resistors. compute the magnitude of the larger of the two resistances
Each driver has a mass of 60.00 kg. Including the drivers, the total vehicle masses are 880 kg for the car and 4080 kg for the truck. The collision time is 0.120s. select coordinates such that the truck is initially moving in the positive x direction..
The isotope Po (A-218 Z-84) can decay by either alpha or beta emission. What is the energy release in each case
A wheel 90.0 cm in diameter accelerates uniformly from 235 rpm to 385 rpm in 6s. How far will a point on the edge of the wheel have travelled in this time.
A puck slides on a surface for 5.6 m before it stops. If it was moving at a velocity of 15 m/s and has a mass of 1.2 kg, what is the force of friction exerted on the puck
A 170g mass attached to a horizontal spring oscillates at a frequency of 3.70Hz. Determine the maximum speed, the maximum acceleration, total energy, and position at t=3.40s.
In the Bohr model of the hydrogen atom, an electron in the 7th excited state moves at a speed of 4.47 104 m/s in a circular path having a radius of 2.59 10-9 m
Communications satellites are placed in a circular orbit where they stay directly over a fixed point on the equator as the earth rotates. find the speed of a satellite in geosynchronous orbit
select the quantity that has changed(velocity or speed) for a car that travels north at 88 km/h and then turns east while continuing to move at 88 km/h. define your answer.
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