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Assuming that Albert\'s push and the friction with the floor are the only horizontal forces acting, what must be the magnitude of the frictional force pushing backward on the box?
Albert pushes a 6-kg box across a level floor. He pushes with a force of 43 newtons, and observes that the box accelerates in the direction of his push at a rate of 2 m/s2. What must be the net force acting on the box?
A 420g oscillator has a speed of 128.5cm/s when its displacement is 3.30cm and 59.5cm/s when its displacement is 5.40cm .what is the oscillator's maximum speed
Estimate the capacitance of the series combination of capacitors shown.
An airtight box has a removable lid of area 2.0 10-2m2 and negligible weight. The box is taken up a mountain where the air pressure outside the box is 0.75 x10^5Pa. The inside of the box is completely evacuated. What is the magnitude of force nece..
A 40.0-gram projectile is launched by the expansion of hot gas in an arrangement shown in part (a) of the figure. The cross-sectional area of the launch tube is 1.0 cm2.
Jack and Jill exercise in a 25.0-m-long swimming pool. Jack swims nine lengths of the pool in 159.5 seconds, while Jill, the faster swimmer, covers ten lengths in the same time interval. Find the average velocity and average speed of each swimmer.
The potential difference between the plates of a capacitor is 242V. Midway between the plates; a proton and an electron are free. The electron is released from rest.
Find an expression for work done by the gas
If electrons are accelerated from rest in an electron gun by sending them through a potential difference of 11.0 kV, what is the resulting kinetic energy of each electron?
A wheel 55-cm in diameter accelerates uniformly from 240 rpm to 395 rpm in 5.0 s. How far will a point on the edge of the wheel have travelled in this time.
A 27 pound meteorite struck a car, leaving a dent 26cm deep in the trunk. If the meteorite struck the car with a speed of 620m/s, what was the magnitude of its deceleration, assuming it to be constant.
An electric motor rotating a workshop grinding wheel at the rate of 106 rev/min is switched off. Assume the wheel has a stable negative angular acceleration of magnitude 1.50 rad/s2.
A force vector has a magnitude of 584 newtons and points at an angle 45o of below the positive x axis. What are (a) x scalar component and (b) y scalar component of the vector.
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