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Calculate the average force a bumper would have to exert to bring a 1200-kg car to rest in 15 cm when the car had an initial speed of 2.0 m/s (about 4.5 mph).
At the position of the compass, what is the magnitude of the magnetic field due to the current in the wire at the following times after the switch is closed? (Fill in the table to help with your calculations. The switch is closed at t = 0 s.) How ..
A 2.30 N force pushes it to the left, and a 0.800 N force pushes it to the right. (a) Taking right to be positive, what is the net force acting on it? (b) What is its acceleration?
q1. one of the most powerful cranes in the world operates in switzerland. it can slowly raise a load of m 5000 tonnes
a 27 pound meteorite struck a car leaving a dent 25 cm deep in the trunk. if the meteorite struck the car with a speed
a hydraulic press consists of two vertical cylinders of circular cross-sectional areas 6cm2 and 120cm2 that are joined
A 75.00 ? resistor, a 95.00 mH inductor, and a 55.00 ?F capacitor are connected in series with an ac source with amplitude of 50.00 V. What is the natural angular frequency
An LRC ac circuit with R=15ohm, L=25mH, and C=30 microF,is attached to a 100V ac power supply. What is the rms current in the circuit
A steel wire of length 1.90 meter with circular cross section must stretch no more than 0.300 centimeter when a tensile (stretching) force of 400 Newton is applied to each end of the wire. Find what minimum diameter is required for the wire
A box of mass 15 kg slides at a constant velocity, along a flat surface, with a coefficient of kinectic friction of 0.75. how much work is done is done by the normal force
A police car is moving at 38m/sec to catchup with a speeder directly ahead. The speed limit is 29.1 m/sec. How fast is speeder going
a typical wall outlet voltage is 120 volts in the united states. personal mp3 players require much smaller voltages
When serving a tennis ball, the player hits it when its velocity is zero (at the highest point of a vertical toss). find the mass of the ball
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