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Get college assignment help at uniessay writers 3.An object has a gravitational potential energy of 24 joules when it rests on a shelf 3 m above the ground. What would be its gravitational potential energy when it is lowered to a shelf 1 m above the ground?

How much work did the movers do (horizontally) pushing a 180- crate 10.6 across a rough floor without acceleration, if the effective coefficient of friction was 0.50?

The coefficient of kinetic friction for a 22 kg bobsled on a track is 0.25. What force is required to push it down a 6.0° incline and achieve a speed of 64 km/h at the end of 75 m?

A circuit consists of a series combination of 5.50 Omega and 5.00 Omega resistors connected across a 50.0 V battery having negligible internal resistance. You want to measure the true potential difference (that is, the potential difference without the meter present) across the 5.00 Omega resistor using a voltmeter having an internal resistance of 10.0 Omega. a) What potential difference does the voltmeter measure across the 5.00 Omega resistor?

A 52 {rm kg} woman stands on a very light, rigid board that rests on a bathroom scale at each end, as shown in figure.

A force of F=9.0i 8.0jN is applied to an object about a fixed axis aligned with the z direction. If the force applied at the point (6.00 m, 9.00 m), what is the magnitude and direction of the torque?

Multiple-Concept Example 6 reviews the concepts that play a role in this problem. A speeder is pulling directly away and increasing his distance from a police car that is moving at 22 m/s with respect to the ground. The radar gun in the police car emits an electromagnetic wave with a frequency of 7.8 x 109 Hz. The wave reflects from the speeder’s car and returns to the police car, where its frequency is measured to be 280 Hz less than the emitted frequency. Find the speeder’s speed with respect to the ground.

A superhero flies 307 m from the top of a tall building at an angle of 35 ◦ below the horizontal. What is the horizontal component of the superhero’s displacement? Answer in units of m. What is the vertical component of the super- hero’s displacement? Answer in units of m.

a ball is tossed into the air at a speed of 64.0 m/s at an unknown angle. If the ball is observed to rise to a maximum height of 7.80 m, at what angle was the ball thrown relative to the ground?

A penny is placed at the outer edge of a disk radius = .150 m that rotates about an axis that is perpendicular to the plane of the disk at the center. The period of the rotation is 1.80 s. Find the minimum coefficient of friction neccesary to allow the penny

Get college assignment help at uniessay writers Part C If the wires carry equal currents of 4.0 A , what is the magnetic field magnitude that each produces at the other’s location? Express your answer using two significant figures. =

An osprey’s call is a distinct whistle at 2200 {rm Hz}. An osprey calls while diving at you, to drive you away from her nest. You hear the call at 2300 {rm Hz} How fast is the osprey approaching?

Determine the voltage of the power supply creating the current in the coil. (THERE IS NO DIAGRAM NOR FIGURE ONLY THE QUESTION ITSELF)

A hunter wishes to cross a river that is 1.9 km wide and that flows with a speed of 4.4 km/h. The hunter uses a small powerboat thatmoves at a maximum speed of 15 km/h with respect to the water. What is the time necessary for crossing if the hunter wishes to move neither upstream nor downstream whilst crossing the river? Draw the vectors to scale on a graph to deter- mine the answer. Answer in units of min.

What is the magnitude of its linear momentum?

A 65.0 kg person throws a 0.0400 kg snowball forward with a ground speed of 26.0 m/s. A second person, with a mass of 57.0 kg, catches the snowball. Both people are on skates. The first person is initially moving forward with a speed of 2.00 m/s, and the second person is initially at rest. What are the velocities of the two people after the snowball is exchanged? Disregard the friction between the skates and the ice. hrower 1 m/s catcher 2 m/s

a quarterback takes the ball from the line of scrimmage,runs backward for 10.0 yards and then runs sideways parallel to the line of scrimmage for 15.0 yards. At the point he throws a 50.0 yards forward pass straight down the field. What is the magnitude of the football’s resultant displacement?

On a very muddy football field, a 110 kg linebacker tackles an 85 kg halfback. Immediately before the collision, the linebacker is slipping with a velocity of 8.6 m/s north and the halfback is sliding with a velocity of 7.4 m/s east.

A 17 loudspeaker is suspended 2.5 below the ceiling by two cables that are each 40 from vertical.

A 5 kg block accelerates down a ramp at a rate of 0.8 m/s^2. The ramp is slanted at an angle of 17.0 degrees to the horizontal. What is the coefficient of kinetic friction between the block and the ramp?

when a 58 g tennis ball is served it accelerates from rest to a constant speed of 42 m/s the impact with the racket gives the ball a constant acceleration over a distance of 37 cm what is the magnitude of the net force acting on the ball?

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November 3, 2019