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A 0.2kg steel ball is dropped straight down onto a hard horizontal floor and bounces straight up. The ball's speed just before and just after impact with the floor is 10m/s. Determine the magnitude of the impulse delivered to the floor by the steel vessel. i) State formula(s).
A 23kg child slides down a 4.0m -high playground slide. What is the change in the thermal energy of the slide and the seat of her pants
The engineer has done a survey and found that almost no one complains if the force directed up the ramp is no more than 20 .Ignoring friction, illustrate at what maximum angle should the ramps be built, assuming a full 28 grocery cart?
A 715 kg car moving at 28 m/s brakes to a stop. The brakes contain about 17 kg of iron that absorb the energy. What is the increase in temperature of the brakes
A man applies a force of F = 3.00 102 N at an angle of 60.0° to a door, x = 2.20 m from the hinges. Find the torque on the door
For the situation, the magnetic field changes with time according to the expression B = (2.00t3 - 4.00t2 + 0.800)T, and r2 = 2R = 5.00 cm. (a) Calculate the magnitude and direction of the force exerted on an electron located at point P2 when t = 2.00..
The gravitational force exerted on a baseball is 2.11 N down. A pitcher throws the ball horizontally with velocity 15.0 m/s by uniformly accelerating it along a straight horizontal line for a time interval of 174 ms. The ball starts from rest.
A dc motor is connected to a constant emf of 15.6 V. The resistance of its windings is 2.0 ohms. What is the back emf induced in the windings at normal speed
Four identical charged particles (q= +10.0µC) are located on the corners of a rectangle. find the direction of the total electric force exerted on the charge at the lower left corner by the other 3 charges
Two stars are at rest 1.0×1014m apart. This is about 10 times the diameter of the solar system. What is the speed of each star at the moment of impact
An ac generator with a frequency of 1.44kHz and an rms voltage of 24.2V is connected in series with a 2.10 kilo-ohm resistor, What is the average power consumed by this circuit
question1if an astronaut can throw a certain wrench 12.0rm m perpendicularly upward on earth how high could he throw it
A rigid tank contains 1.40 moles of an ideal gas. Determine the number of moles of gas that must be withdrawn from the tank to lower the pressure of the gas from 27.2 atm to 5.90 atm. Assume the volume of the tank and the temperature of the gas re..
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