2022-03-20

You can still ask an expert for help

asked 2021-02-12

A skier of mass 70 kg is pulled up a slope by a motor driven cable. (a) How much work is required to pull him 60m up a 30 degree slope (assumed frictionless) at a constant speed of 2.0 m/s ?(b) What power must a motor have to perform this task?

asked 2021-02-21

A 5.00 kg package slides 1.50 m down a long ramp that is inclined at $12.0}^{\circ$ below the horizontal. The coefficient of kinetic friction between the package and the ramp is k =0.310. Calculate

(a) the work done on the package by friction (b) the workdone on the package by gravity (c) the work done on the package bythe normal force (d) the total work done on the package (e) Ifthe package has a speed of 2.20 m/s at the top of the ramp, what isits speed after sliding 1.50 m down the ramp?

asked 2021-03-07

A block of mass m=2.20 kg slides down a 30 degree incline which is 3.60 m high. At the bottom, it strikes a block of mass=7.00 kg which is at rest on a horizontal surface in the picture. If the collision is elastic, and friction can be ignored, determine (a)the speeds of the two blocks after the collision, and (b) how far back up the incline the smaller mass will go.

asked 2021-02-23

The spring in the figure (a) is compressed by length delta x . It launches the block across a frictionless surface with speed v0. The two springs in the figure (b) are identical to the spring of the figure (a). They are compressed by the same length delta x and used to launch the same block. What is the block's speed now?

asked 2021-10-12

What are the derivatives of the six basic hyperbolic functions? What are the corresponding integral formulas? What similarities do you see here to the six basic trigonometric functions?

asked 2022-05-15

Solving ${\mathrm{sin}}^{2}x+{\mathrm{sin}}^{2}2x-{\mathrm{sin}}^{2}3x-{\mathrm{sin}}^{2}4x=0$

asked 2022-01-23

How do you find the composition of function given $f\left(x\right)=\sqrt{x+8}$ and $g\left(x\right)=4x+1$