Physics Answers

The velocity of a particle undergoing simple harmonic motion is described by,

𝑣(𝑡) = 2.25m/s cos(0.555 rad/s∙ 𝑡 + 0.450 rad) What is the particle’s maximum acceleration? 

A 6.00 kg aluminum metal is suspended in a rope and partially immersed in water (𝜌𝑤𝑎𝑡𝑒𝑟 = 1000 kg/m3). If the tension in the rope is 4.55 N, what volume of aluminum was immersed? 

A disk is turning with an angular acceleration of 10 m/s^2. What is the tangential

acceleration at 0.50 m from the center of the disk?

A block of mass 30.0 [kg] slides down from the top of the incline. The coefficient of kinetic friction between the block and the incline is 𝜇𝑘 = 0.350. What is the total work done on the block as it reaches the bottom of the incline?

A boulder is moved by applying force to two ropes that are tied to it. The forces 120 lb towards the

west and 150 lb towards south . What is the net force applied to the boulder?

A power station conveyor lifts 500 tons of coal per hour to a height of 80 feet. What average

horsepower is required?

If the coefficient of friction between tires and roadway is 0.50, what is the smallest radius at which

a car can turn on a horizontal road when its speed is 30 miles/hour?

An aircraft has a mass of 509 000 kg. The total force from its jet engine is 800 000 N. What is it's acceleration?

A 100-m-long copper wire of radius 0.12 mm is connected across a 1.5-V battery has 9.4 x 10¹⁹ electrons passing a cross section of the wire every 3.0 s. Calculate the resistance of this wire.

An accelerator at a Physics Laboratory can accelerate protons to a Kinetic energy of 10 ^ 12 * eV The rest mass of a proton is m * c ^ 2 = 9.38 * 10 ^ 6 * cV . What is the speed of that proton?