Other Physics Answers

A car is traveling north at 20.8 m/s. After 10.2 s its velocity is 13.2 m/s in the same direction. The magnitude and direction of the car's average acceleration is:

Three forces, F1, F2, and F3, all act on an object, as shown in the figure. The magnitudes of the forces are: F1 = 78.67 N, F2 = 53.27 N, and F3 = 20.30 N. The magnitude of the resultant force acting on the object is given by

A 12.4 -uF capacitor is connected throgh a 0.895-MΩ resistor to a constant potential difference of 60.0 V (a) compute the charge on the capacitor at the following times after the connections are mad:0, 5.0s, 10.0s, 20.0 s and 100s. (b) compute the charging currentsat the same instants

A 70 kg skier starts to slide from H = 25 m above the jumping ramp as shown in the figure and jumps off the ramp at an angle of @ = 30°. If the ramp is frictionless and the effect of air resistance is neglected, (a) What is the maximum height h that the skier can reach after jumping off the ramp? (b) If the skier had increased his weight by putting on a backpack, woulf the height h be higher, lower or remain the same? Explain. (C) If there was air resistance, would the height h be higher, lower or remain the same? Explain. (d) What would h be if the length of the path above the jump point of the ramp (i.e., the part of the path above the dashed line according to the figure) were d = 50 m and the coefficient of the kinetic friction Mk = 0.2 ?

what is the internal energy of the 1700 kg lead considering that its standard coefficient of thermal and specific heat that has made a 6 m cube of lead heated from 30 degrees to 300 degrees celsius

A practical matter A power line carries a current of 350A. What is the magnetic field in a house located 95m away from the power line?

You raise a bucket of water from the bottom of a well that is 15 m deep. The mass of the bucket and the water is 4.45 kg, and it takes 11 seconds to raise the bucket to the top of the well.

Find the amount of work it takes to raise the bucket.

A 73 kg jogger increases their kinetic energy from 212 Joules to 261 Joules. How much work did the jogger do by increasing their speed?

Two equal length of wire made of the same materials, but different diameters, have an effective resistance of 0.852, when they are connected in parallel. If the cross sectional area of one is four times the other calculate the resistance of the ticker wire

1200-kg car pulls a boat on a trailer. (a) What total force resists the motion of the car, boat, and trailer, if the car exerts a 2000-N force on the road and produces an acceleration of 0.5 m/s2 & the mass of the boat plus trailer is 800 kg. (b) What is the force in the hitch between the car and the trailer if 80% of the resisting forces are experienced by the boat and trailer?