Physics, 30.01.2021 01:10 unknown1246
A moving car has kinetic energy. To bring the car to rest, you must decrease its kinetic
energy to zero. The brakes do this work by applying a force over a distance. What effect would doubling the speed have on the braking distance? which of the following is correct
The braking distance would be 2 times greater.
The braking distance would be 2 times smaller.
The braking distance would be 4 times smaller.
The braking distance would be 4 times greater.
Answers: 2
Physics, 21.06.2019 17:10, Bamaboy8804
Space-time metric ds2= -dt2+at2dx2+bt2dy2+ct2dz2 (a)how does the area of a rectangle with vertices at ( x=0, y=0, z=0 ), (1,0,0 ), ( 0,1,0 ) and (1,1,0 ) changes with time? (b) if a photon moving in the x direction starts from the origin at t=1, when does it reach x=l? (ds=0 for the trajectory of a photon.) (c) the proper time for a particle is defined by cd=ds. what is the proper time for a particle to move along the trajectory ( x(t)=t, y(t)=0, z(t)=0 ) from t=0 to 1 ? what is the condition on the parameter a so that the velocity of the particle never exceeds the speed of light ?
Answers: 2
Physics, 21.06.2019 23:30, supernova69
In which of the following cases is work being done on an object? question 2 options: pulling a trailer up a hill carrying a box down a corridor suspending a heavy weight with a strong chain pushing against a locked door
Answers: 2
Physics, 22.06.2019 15:00, sswd
Steelhead trout migrate up stream to spawn. occasionally they need to leap up small waterfalls to continue their journey. fortunately, steelhead are remarkable jumpers, capable of leaving the water at a speed of 8.0 m/s. a. what is the maximum height a steelhead trout can jump? b. leaving the water at 8.0 m/s, the trout lands on top of the water fall 1.8 m high. how long was it in the air?
Answers: 2
A moving car has kinetic energy. To bring the car to rest, you must decrease its kinetic
energy to...
Mathematics, 11.06.2020 21:57
Mathematics, 11.06.2020 21:57
Mathematics, 11.06.2020 21:57
Mathematics, 11.06.2020 21:57