Mechanics | Relativity Answers

A large sled is located with rocks and sits at the top of a snowy slope as shown in the diagram below

the sled and Rock weigh a total of 1250kg the top of the slope is 100m away from the bottom and 12.0 m vertically higher than it

the sled is initially stationary and then begins to slide without friction down the incline at what speed will the sled be travelling when it reaches the bottom of the slope in ms-1

The velocity of a particle is v=v0[1-sin(xt/T)]. Knowing that the particle starts from the origin with an initial velocity vo, determine (a) its position and its acceleration at t = 3T, (b) its average velocity during the interval t = 0 to t = T.

car start from rest and accelerate uniformly for 10s until it attains a velocity of 25m/s it then travel with the uniform velocity for 20s before decelerating sketch a velocity time graph of the motion of the car

at what speed does a gun recoil if it weight 44.5 n and fires a 1.0g bullet at a 2500m/s

The mechanical power output of a cyclist moving at a constant speed of 6.60m/s on a level road is 124W. What is the force exerted on the cyclist and the bicycle by thr air?

1. Calculate the force of gravity on a 1.2x105 kg space station at a distance of 3.5x105 m from Earth’s surface.

A 6.5 m ladder leans against a wall, making an angle of 60o with the ground. If the foot of the ladder is

push 75 cm closer to the wall in Figure 1, how far will the ladder slide up the wall?

 coil of wire 4 m long has a resistance of 20 2. If its resistivity is 108 x 10*2 m, find its

area of cross-section

A brick is dropped from 100 m up. Find its impact velocity and air time

Incandescent lightbulbs have a power output rating of 60.0W, while a CFL bulb has a power output rating of 13.0W. Determine the difference in the amount of energy each bulb burns in 1 hour if a CFL is 85% efficient and an incandescent bulb is 65% efficient.