Recent content by wbetting

Homework Statement In Fig. 22-31 the four particles are fixed in place and have charges q1 = q2 = 3e, q3 = 2e, and q4 = -10e. Distance d = 5.42 μm. What is the magnitude of the net electric field at point P due to the particles? Homework Equations E=1/(4πε0) x [ q4/2d^2-q3/d^2] j...

Homework Statement a plastic ring of radius R = 50.4 cm. Two small charged beads are on the ring: Bead 1 of charge +2.00 μC is fixed in place at the left side; bead 2 of charge +6.00 μC can be moved along the ring. The two beads produce a net electric field of magnitude E at the center of the...

Homework Statement Sphere A with mass 70 kg is located at the origin of an xy coordinate system; sphere B with mass 69 kg is located at coordinates (0.29 m, 0); sphere C with mass 0.40 kg is located at coordinates (0.15 m, 0.11 m). In unit-vector notation, what is the gravitational force on...

Homework Statement A gymnast with mass 46.0 kg stands on the end of a uniform balance beam. The beam is 5.00 m long and has a mass of 250 kg (excluding the mass of the two supports). Each support is 0.540 m from its end of the beam. In unit-vector notation, what are the forces on the beam due...

i did this and got .502 which was the wrong answer!

Homework Statement A funny car accelerates from rest through a measured track distance in time 21 s with the engine operating at a constant power 240 kW. If the track crew can increase the engine power by a differential amount 1.0 W, what is the change in the time required for the run? I...

Here is the diagram

Homework Statement in a two-dimensional tug-of-war, Alex, Betty, and Charles pull horizontally on an automobile tire at the angles shown in the picture. The tire remains stationary in spite of the three pulls. Alex pulls with force of magnitude 211 N, and Charles pulls with force of magnitude...

Homework Statement Body A in Fig. 6-33 weighs 96 N, and body B weighs 88 N. The coefficients of friction between A and the incline are μs = 0.54 and μk = 0.24. Angle θ is 42°. Let the positive direction of an x-axis be down the slope. What is the acceleration of A if A is initially (a) at...

Homework Statement in a two-dimensional tug-of-war, Alex, Betty, and Charles pull horizontally on an automobile tire at the angles shown in the picture. The tire remains stationary in spite of the three pulls. Alex pulls with force of magnitude 211 N, and Charles pulls with force of magnitude...

so i tried to use d=1/2gt^2 and got .664 seconds for time up but when i time required to come back down d for final height is 0 so how can i do 0=1/2gt^2 without getting 0?

Homework Statement A basketball player grabbing a rebound jumps 75.4 cm vertically. How much total time (ascent and descent) does the player spend (a) in the top 13.3 cm of this jump and (b) in the bottom 13.3 cm? Do your results explain why such players seem to hang in the air at the top of a...

Homework Statement Suppose that a shot putter can put a shot at the worldclass speed v0 = 14.00 m/s and at a height of 2.160 m. What horizontal distance would the shot travel if the launch angle θ0 is (a) 45.00° and (b) 41.00°? The answers indicate that the angle of 45°, which maximizes the...

Just forgot the - sign!

Homework Statement Catapulting mushrooms. Certain mushrooms launch their spores by a catapult mechanism. As water condenses from the air onto a spore that is attached to the mushroom, a drop grows on one side of the spore and a film grows on the other side. The spore is bent over by the drop's...