Acar traveling at a constant speed of 28.5 m/s passes a trooper hidden behind a billboard, as in the figure. one second after the speeding car passes the billboard, the trooper sets off in chase with a constant acceleration of 3.82 m/s2. (a) how long does it take the trooper to overtake the speeding car? (b) how fast is the trooper going at that time? m/s exercise getting started i im stuck! hints: a motorist with an expired license tag travels at a constant speed of 10.5 m/s down a policeman on a motorcycle, taking another 4.22 s to finish his donut, gives chase at an acceleration of street, and a m/s2 2.82 (a) find the time required to catch the car t = s (b) find the distance the trooper travels while overtaking the motorist.

The intensity of a polarized electromagnetic wave is 12 w/m^2. part a) what will be the intensity after passing through a polarizing filter whose axis makes the angle θ=0∘ with the plane of polarization? part b) what will be the intensity after passing through a polarizing filter whose axis makes the angle θ=30∘ with the plane of polarization? part c) what will be the intensity after passing through a polarizing filter whose axis makes the angle θ=45∘ with the plane of polarization? part d) what will be the intensity after passing through a polarizing filter whose axis makes the angle θ=60∘ with the plane of polarization? part e) what will be the intensity after passing through a polarizing filter whose axis makes the angle θ=90∘ with the plane of polarization?

An ideal otto cycle has a compression ratio of 10.5, takes in air at 90 kpa and 40°c, and is repeated 2500 times per minute. using constant specific heats at room temperature, determine the thermal efficiency of this cycle and the rate of heat input if the cycle is to produce 90 kw of power.

Astudent pushes a 60-n block across the floor for a distance of 10 m. how much work was done to move the block