Physics
During a baseball game, a batter hits a pop up to a fielder 65m away. The acceleration of gravity is 9.8m/s^2. If the ball remains in the air for 5.7s, how high does it rise? Answer in units of m.
physics
65 = .5 g t^2 130 = 9.8 t^2 the distance is 7.8*t
physics
.4 = .5 g t^2 .8 = 9.8 t^2 the x-velocity is 76/t
physics
A student moves a box of books down the hall by pulling on a rope attached to the box. The student pulls with a force of 173 N at an angle of 27.5 above the horizontal. The box has a mass of 27 kg, and μk between the box and the floor is 0.2. The acceleration of grav...
physics
Consider the 57 N weight held by two cables shown below. The left-hand cable is horizon- tal. 57 N 52 a) What is the tension in the cable slanted at an angle of 52? Answer in units of N
physics
A 2.67 kg block starts from rest at the top of a 27.6 incline and accelerates uniformly down the incline, moving 2.89 m in 2.45 s. The acceleration of gravity is 9.81 m/s2 . a) What is the magnitude of the accelera- tion of the block? Answer in units of m/s2
physics
A 31 kg box slides down a 33.0 ramp with an acceleration of 1.30 m/s2. The acceleration of gravity is 9.81 m/s2 . Find the coefficient of kinetic friction between the box and the ramp.
math(please help)
Al + As + B = 124 Al + B = 102 subtracting equations ___ As = 22 Al + As = 86 subtracting equations ___ Al = 64 subtracting equations ___ B = 38
Physics
the vertical component of the brick's velocity is 13.9 * sin(27.6º) 0 = (-.5 g 3^2) + [13.9 * sin(27.6) * 3] + (building height)
Math
d/dx [cos(x)]^2 = 2 cos(x) * [-sin(x)]
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