A 17.8 kg flood light in a park is supported at the end of a horizontal beam of negligible mass that is hinged to a pole. A cable connected to the beam helps to support the light

A 30.0 kg block is resting on a flat horizontal table. On topof this block is resting a 15.0 kg block, to which a horizontal spring is attached. The spring constant of the spring is 325 N/m. The coefficient of kinetic friction between the lower block and the table is 0.600, and the coefficient of static friction between the two blocks is 0.900. A horizontal force is applied to the lower block. This force is increasing in such a way as to keep the blocks moving at a constant speed. At the point where the upper block begins to slip on the lower block,determine (a) the amount by which the spring is compressed and (b) the magnitude of the force F.

Find the tension in each cord in Figure if the weight ofthe suspended object is w.
a)
b)

In a truck-loading station at a post office, a small 0.200-kg package is released from rest a point A on a track that is one quarter of a circle with radius 1.60 m.The size of the packageis much less than 1.60m, so the package can be treated at aparticle. It slides down the track and reaches point B with a speed of 4.80 m/s. From point B, it slides on a level surface a distanceof 3.00 m to point C, where is comes to rest.
(a) What is the coefficient of kinetic friction on the horizontal surface?
(b) How much work is done on the package by friction as it slides down the circular arc from A to B?

A 0.48 kg piece of wood floats in water but is found to sinkin alcohol (specific gravity= 0.79) in which it has an apparentmass 0.035 kg. What is the SG of the wood?

Determine the moment of inertia for the shaded area about the x axıs

A sinusoidal electromagnetic wave is propagating in vacuum in the ${\displaystyle +z-direction}$. If at a particular instant and at a certain point in space the electric field is in the ${\displaystyle +x-direction}$ and has magnitude ${\displaystyle 4.00\frac{V}{m}}$, what are the magnitude and direction of the magnetic field of the wave at this same point in space and instant in time?

A car is stopped at a traffic light. It then travels along a straight road such that its distance from the light is given by ${\displaystyle x\left(t\right)=b{t}^2-c{t}^3}$ , where ${\displaystyle b=2.40\frac{m}{s^2}}$ and ${\displaystyle c=0.120\frac{m}{s^3}}$ (a) Calculate the average velocity of the car for the time interval t = 0 to t = 10.0 s. (b) Calculate the instantaneous velocity of the car at t=0, t = 5.0 s, and t = 10.0 s. (c) How long after starting from rest is the car again at rest?