Other Physics Answers

 A person driving her car at 20m/s spots at a distance of 40m ahead a deer trying to cross the road. (a) If the maximum acceleration of the car is -6m/s2 , which is the maximum reaction time Δt of the driver so that the car avoids hitting the deer? (b) If the drivers reaction time is 1.2s what is the speed with which the car will hit the deer? (c) Sketch a velocity-time graph for the car.

A 12 Kg box is put on the surface of an inclined plane at 38 ° with the horizontal. The coefficient of kinetic friction is 0.35. Determine the magnitude of the force exerted by the inclined plane on the box.

A skateboarder rolls horizontally off the top of a staircase and lands at the bottom. The staircase has a horizontal length of 13 m, with a vertical drop of 3 m. We can ignore air resistance. What is the skater's initial horizontal velocity?

An airplane accelerates from rest down a runway at 5.30 m/s ^ 2 for 74.2 s until is finally the ground . Determine the distance traveled before takenff

The intensity of a wave at a point is 5.0 W m -2 when the amplitude of the wave there is 2.0 mm. What is

the amplitude at the point when the intensity is increased to 22.5 W m -2 ?

A pulse has a speed 5cm.s-¹ how far does it travels in 2,5s

The amplitude of a wave at a distance of 5.0 m from a small point source is 0.20 mm. What would be

the amplitude if the distance from the source is increased to 20 m?

Estimate the average power of a water wave when it hits the chest of an adult male standing in the water

at the seashore. Assume that the amplitude of the wave is 0.50 m, the wavelength is 2.5 m, and the

period is 4.0 s.

Two waves traveling along a stretched string have the same frequency, but one transports 2.5 times the

power of the other. What is the ratio of the amplitudes of the two waves?

Determine if the function y = A sinkx cosωt is a solution to the wave equation.