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a. If you push a lawn mower across a yard in 10 seconds, how does the work done compare with pushing it across the same yard in 20 seconds? Explain why.
b. How does the power for 10 seconds compare to the power for 20 seconds?
Type your quCliff and Will are carrying a uniform 2.0m board of mass 71kg. Find the normal forces exerted by Cliff and Will
Two 4.0cm × 4.0cm square aluminum electrodes, spaced 0.70mm apart are connected to a 200Vbattery, What is the charge on the positive electrode
A cannon tilted up at a 30.0 angle fires a cannon ball at 70.0 m/s from atop a 30.0m -high fortress wall. What is the ball's impact speed on the ground below
an 830-kg race car can drive around an unbanked turn at a maximum speed of 58 ms without slipping. the turn has a
Suppose the act of throwing the tool takes the austronaut 0.7 seconds, that is she applied a force to the tool before it leaves her hand. What velocity toward the space shuttle will that have given her? And if she was 12m away from the shuttle to sta..
A 0.42 kg ball is dropped from rest at a point 1.30m above the floor. The ball rebounds straight upward to a height of 0.580 m. What are the magnitude and direction of impulse of the net force applied to the ball during the collision with the floo..
A car is driving directly north on the freeway at a speed of 101 km/h and a truck is leaving the freeway driving 90 km/h in a direction that is 34° west of north
A solenoid 7.5 cm in radius and 88m in length has 9800 uniformly spaced turns and carries a current of 3.5 A. What is the magnetic flux through this circular surface
The graph shows the component of a force acting on an object, Find the work done by the force over the specified intervals of displacement
A tuning fork is sounded above a resonating tube (one end closed) which resonates at a length of 0.32 m and again at 0.91 m. What is the frequency of the fork
The tank is shelling at a target that is 4km away and 60m above ground. If the shell is being fired at 30degrees above the horizontal, determine the release speed of the shell
an explorer is caught in a whiteout in which the snowfall is so thick that the ground cannot be distinguished from the
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