You throw a ball straight forward with a velocity of 20 m/s, from a height of 1 meter. How far will it be when it hits the ground after 0.45 seconds?
A wrench dropped by a worker freely falls from the top of an 80m tall tower. What is the velocity of the wrench at the instant before it hits the ground? 1) What are the known quantities involved? 2) Which equation can be used to find the velocity with the given information? 3) what is the velocity of the wrench at the instant just before it hits the ground? 4) What is the total time for the wrench to hit the ground?
A ball is projected with an initial upward velocity of 20 m/s and horizontal velocity of 25 m/s a,what is magnitude of the initial velocity b,what is the time required to reach hmax c, calculate the maximum height d,calculate the range
Determine the net capacitance C of each network of capacitors shown below. Assume that C1=1.0pF, C2=2.0pF, C3=4.0pF, and C4=5.0pF
One way to find the mass of an object is to measure its acceleration when a force acts on it. If a force of 80 N causes a box to accelerate at 0.10 m/s², what is the mass of the box?
A crowbar of 200 cm long is pivoted about to its other end to displace a load of 600 N. 0.5 m Calculate MA, VR and efficiency of the crowbar.
Calculate the new length of a 7.6 m abseiling rope when 4.8x10² J of elastic potential energy are stored in the stretched rope. Give your answer correct to 3 significant figures. The spring constant of the rope is 9.0x10² N/m
If the current leaving the cell in a parallel circuit is 0.3 A, what is the sum of the currents through all the branches in the parallel circuit?
Calculate the velocity of the 2.0 kg mass just before it hits the rocks when it is dropped from a height of 16 m above the surface of the rocks. Give the unit. Velocity:........ Unit: .......
Compare the use of an electric bicycle with a normal bicycle used to cycle a 5 km uphill route. The cyclist does not pedal when using the electric bike to cycle uphill. Information about the two bikes is given in Table 1. Table 1 Information power of the motor force used to drive the bicycle forward weight of bicycle battery life time to travel 5 km Electric bicycle 350 W 50 N 190 N 25 minutes 12 minutes Ordinary bicycle no motor 47 N 120 N no battery 13 minutes Your answer should contain descriptions of work done, energy transfers, and power.
