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Question1
A hotel elevator ascends 160 with a utmost speed of 4.9. Its acceleration and deceleration both have a magnitude of 1.5.
How far does an elevator move while accelerating to full speed from rest?
How long does it take to make the complete trip from bottom to top?
Question2
A police car is travelling at a velocity of 18.0 m/s due north, while a car zooms by at a constant velocity of 46.0 m/s due north. After a reaction time 0.400 s the policeman begins to pursue the speeder with an acceleration of 4.00 m/s^2. Including reaction time, how long does it take for the police car to grab up with the speeder?
Question3
A 50.0g ball travelling at 25m/s bounces off a brick wall and rebounds at 22m/s. If the ball is in contact with the wall for 3.50 ms, what is the magnitude of the average acceleration of the ball during this time period?
Two particles each have a mass of 5.5 x 10-4 kg. One has a charge of +4.8 x 10-6 C, and the other has a charge of -4.8 x 10-6 C. How fast is each particle moving when the separation between them is one-third its initial value
What is the percent change in momentum of a proton that accelerates from 0.42c to 0.91c?0
Calculate the magnitude of the current density in the wire. Find out the work done by the hockey player on the puck. What is the change in kinetic energy of the puck.
Plane leaves the airport in Galisto and flies a distance 180 at an angle 68 east of north and then changes direction to fly the distance 250 at an angle 48 south of east, after which it makes an immediate emergency landing in a pasture.
What pull does each one exert if their resultant pull is 402-N straight upward.
If a 4 cm piece of insulation is added to the pine ceiling kpine = 0.120 J/msC kinsul = 0.042 J/msC If a 4 cm piece of insulation is added to the pine ceiling , find the interface temperature for the pine and insulation.
Assume the system rotates in the yz plane about the x axis with an angular speed of 2 rad/s. Find out the moment of inertia of the system about the x axis.
A uniform-density 8 kg disk of radius 0.27 m is mounted on a nearly frictionless axle. Initially it is not spinning. A string is wrapped tightly around the disk, and you pull on the string with a constant force of 39 N by a distance of 0.7 m. Now ..
A 3.83 ohm resistor, a 7.53 ohm resistor, and a 9.02 ohm resistor are connected in series with a 15.0 V battery. What is the current in each resistor
obtain the equation of motion for a 125g mass at the end of a perfectly elastic spring which when stretched 14.5 cm from equilibrium, find the maximum velocity and total energy of the mass
This question has to do with the oil drop experiment and how much voltage must be applied to keep a drop suspended in air. how much voltage must be used to keep the oil drop suspended
A 1500 kg elevator moves upward with constant spped through a veticle distance of 25m. Explain how much work was done by the tension in the elevator cable?
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