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What is the minimum work needed to push a 950kg car 810m upalong a 9.0 degree incline?
a.) ignore friction
b) assume theeffective coefficient of friction retarding the car is 0.25.
Two radio-frequency point sources S1 and S2, separated by distance d = 1.6 m, are radiating in phase with ? = 0.4 m. How many maxima does it detect
A cylindrically shaped piece of collagen (a substance found in the body in connective tissue) is being stretched by a force that increases from 0 to 2.73 10-2 N. How much work is done by the variable force that stretches the collagen
Two blocks rest on a horizontal frictionless surface. (top block weighs xkg, the bottom box weighs 10kg). what is the mass of the top box
A tennis player receives a shot with the ball (0.0600 kg) traveling horizontally at 52.0 m/s and returns the shot with the ball traveling horizontally at 36.0 m/s in the opposite direction. What work does the racket do on the ball
A 0.600 kg ball falls directly down onto concrete, hitting it with a speed of 13.5 m/s and rebounding directly upward with a speed of 3.00 m/s. What is the impulse on the concrete
a 5.20 x 102 kg hot-air balloon takes off from rest at the surface of the earth. the nonconservative wind and lift
an airplane has a mass of 27500 kg and takes off under the influence of a constant net force of 41000 n. what is the
An archer shoots an arrow toward a 300-g target that is sliding in her direction at a speed of 2.50 m/s on a smooth, slippery surface. What is the speed of the arrow after passing through the target
q1. what are the magnitude and direction of the electric field 21.2 cm directly above an isolated 40.7 x 10-6 c
Three forces act on an object. A 2 N force acts due east and a 3 N force acts due north. If the net force on the object is zero, what is the magnitude of the third force?
In her bathroom, Mindy has an overhead heater that consists of a coiled wire made of nichrome that gets hot when turned on. When the heater is first turned on, it has not yet heated up, so it is operating at 20° C. What is the current through the wi..
q1. if the accelerating plates are 1.60 apart and have a potential difference of 2.60times104 what is the magnitude of
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