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A 600 gram particle (initially at rest at the origin) is subjected to a force of F=15i+20j (N) which pushes the particle along a track with a displacement described by s=3i+4j (m).
a. calculate the work done by this force by using the vector scalar product:
b. calculate the average power produced by this force:
A 50 kg pole vaulter running at 10 m/s vaults over the bar. if the vaulter's horizontal component of velocity over the bar is 1 m/s and air resistance is disregarded, how high was the jump.
After falling from rest from a height of 26.0 m, a 1.1 kg ball rebounds upward, reaching a height of 16.0 m. what average force was exerted on the ball
Two earthquake waves of the same frequency travel through the same portion of the Earth, What is the ratio of the amplitudes of the two waves
Four charges, Aq, Bq, Cq, and Dq (where q = 2.25 ×10?7 C), sit in a plane at the corners of a square whose sides have length d = 82.5 cm. A charge, Eq, is placed at the origin at the center of the square.
q1. a magnifier has a magnification of 7x.how far from the lens must an object be placed so that its virtual image is
A 74 kg person is parachuting and experiencing a downward acceleration of 2.9 m/s2. The mass of the parachute is 5.8 kg. find the upward force on the open parachute from the air
A box with mass 7.0 kg is sliding down a frictionless ramp that is 2.6 m long and inclined at 33 deg. above the horizontal. how long will it take to reach the bottom of the ramp
A skier starts from rest at the top of a 48 m hill, skis down a 32° incline into a valley, and continues up a 28 m high hill. How fast is the skier moving at the bottom of the valley
Your car's fan belt turns a pulley at 3.15rev/s . When you step on the gas for 1.55s , find Through what angle did the pulley turn while accelerating
A spring with spring constant k = 430 N/m is initially compressed x = 1.60 cm. How much work is done by the spring during this process
Two large equipotent surfaces are flat and parallel and separated by a relatively small distance compared to their size. What is the direction of the electric field midway between the surfaces
The loaded cab of an elevator has a mass of 3.7 x 10^3 kg and moves 228 m up the shaft in 21 s at constant speed. At what average rate does the force from the cable do work on the cab.
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