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1.) A 100-kg box on the right and a 45-kg box on the left are tied together by a horizontal cable. The 100-kg box is acted upon by an external force of 560 N to the right. The frictional force exerted by the floor on the 100-kg box is 40 N and the frictional force exerted by the floor on the 45-kg box is 15 N. What is the magnitude of the tension in the connecting cable?
2.) Two people play tug of war. The 100-kg person on the left pulls with 1,000 N, and the 70-kg person on the right pulls with 830 N. Assume that neither person releases their grip on the rope with either hand at any time, assume that the rope is always taut, and assume that the rope does not stretch. What is the magnitude of the tension in the rope in Newtons?
3.) A 69-kg woman in an elevator is accelerating downward at a rate of 1.3 m/s2. What is the magnitude of the force exerted by the elevator floor on the woman's feet?
4.) In a fit, a toddler throws straight down his favorite 2 kg toy with an initial velocity of 1 m/s. What is the magnitude of the velocity in m/s of the toy when it strikes the ground 0.5 seconds later?
The equation of a transverse wave traveling in a rope is given by y=60 sin(pi/2) (0.0050x - 8.0t - 0.57), Write down the equation of a wave that, when added to the given one, would produce standing waves on the rope having a node at x = 0
A heat engine takes in 400J of energy from a hot reservoir and performs 35J of work in each cycle. obtain the energy expelled to the cold reservoir in each cycle
A hockey puck of mass m = 150 g is attached to a string that passes through a hole in the center of a table, what speed must the hockey puck have
What are the electron and hole quasi-Fermi potential differences between the two ends of the bar of 1cm? What is the applied voltage across the 1cm bar? Are your answers consistent?
The mass of the brick will change but the weight of the brick will remainthe same. Both the mass and the weight of the brick will change.Both the mass and the weight of the brick will remain the same. The mass of the brick will remain the same but..
A 40.0 kg wagon is towed up a hill inclined at 17.3° with respect to the horizontal. How fast is the wagon going after moving 80 m up the hill
What is the total charge of all the electrons in a 16 kg bar of iron, What is the net charge of the bar if it managed to get rid of 2% of the electrons
Complete the missing information in the tables above showing all working and explanations on a separate sheet. No marks will be given if the working or explanations for your results cannot be identified. Number the equations in your working and cr..
If the maximum acceleration that is tolerable for passengers in the new train system of Oahu is 2 m/s^2 and the train stations are located 750 meters apart, what is the maximum speed the new train can reach between stations? What is the travel tim..
When a car is traveling at 23 m/s on level ground, the stopping distance is found to be 20 m. What is the stopping distance now, as measured along the incline
To empty a flooded basement, a water pump must do work (liftthe water) at a rate of 2.00 kW. If the pump is wired to a 240-Vsource and is 84% efficient, how much current does it draw
To store the energy produced in 1hour by a 110 electric power plant, how many cubic meters of water will have to be pumped from the lower to the upper reservoir? Suppose the upper reservoir is 510 meters above the lower one, and we can neglect the sm..
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