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1. A 5.60kg block located on a horizontal floor is pulled by a cord that exerts a force F = 11.5 N at an angle theta = 28.5o above the horizontal, as shown in the Figure. The coefficient of kinetic friction between the block and the floor is 0.08. What is the speed of the block 5.5s after it starts moving?
2. A block is at rest on an inclined plane whose elevation can be varied. The angle of elevation theta is increased slowly from the horizontal, and when it reaches 35.9 degrees, the block begins to slide. Calculate the coefficient of static friction.
3. The block reaches a speed of 3.18m/s in a time of 1.23s. Calculate the coefficient of kinetic friction.
A pencil is held perpendicular to the optical axis of a concave spherical mirror. The pencil is 81 cm from the center of the mirror, What is the magnification of the pencil's image
An object of mass m is dropped at time t = 0 from the roof of a building of height h. How far is the object displaced horizontally before hitting the ground? Express your answer in terms of m, g, F, and h
The height of a helicopter above the ground is given by h = 3.00 t3, where h is in meters and t is in seconds. After 2.00 s, the helicopter pilot lets go of a small mailbag. How long (in seconds) after its released does the mailbag reach the ground?
A bullet leaves the muzzle of a gun at a speed of 400m/s. The length of the gun barrel is 0.50m. Assuming the bullet was uniformly accelerated .
An RLC circuit has a reactance, due to its capacitance, of 19 kilo ohms a reactance, due to its inductance, of 10 kilo ohms; and a resistance of 25 kilo ohms
An old Chrysler with mass 2000 kilogram is moving along a straight stretch of road at 88 km/h. Find how fast is the center of mass of the two cars moving
Three springs, connected in series, with K1 =30, K2 = 40 and K3 = 50 N/m are suspended vertically with a 20 kg mass attached to the bottom. What frequency will the three-spring system oscillate?
A 94 g piece of ice at 0.0°C is placed in an insulated calorimeter of negligible heat capacity containing 100 g of water at 100°C, What is the final temperature of the water once thermal equilibrium is established
Assume we start out with a vapor of 20 mol% toluene at high enough temperature that everything is in the gas phase and cool it at ambient pressure p = 101.3 kPa. Determine the dew point where the rst drop is formed analytically assuming ideal solu..
Four point charges have equal magnitudes. Three are positive, and one is negative, Calculate the ratio of the largest to the smallest net force magnitude
A diverging lens (f = -11 centimeter) is placed 20.0 centimeter to the left of a converging lens (f = 34.0 centimeter). Estimate the distance of the final image relative to converging lens
At a distance of 65 centimeter, a mosquito can barely be heard at a sound level of 4.9 dB. Evaluate what is the intensity of this sound
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