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A car with a mass of 1500kg moving at 40m/s comes to a stop in8 seconds.
What is the change in momentum of the car?
What is the magnitude of the breaking force need to stop thecar in 8 seconds?
A uniform ladder is 10-m long and it weighs 100-N. The ladder leans against a smooth wall with its base on a sidewalk 6-m from the base of the wall. Find the force exerted on the ladder by the wall
A ladybug is sitting at the center of a turntable. The turntable is rotating on a frictionless bearings and it rotates without assistance from a motor. As the ladybug walks to the edge of the turntable, what happens to combined angular momentum of..
A 115 V fish-tank heater is rated at 120 W, Calculate the current through the heater when it is operating
Once a traffic light turns green, a car speeds up from rest to 50 mi/h with constant acceleration 9 mi/h • s. In the adjoining bike lane, a cyclist speeds up from rest to 20mi/h with constant acceleration 13mi/h.
A very large box of doughnuts weighs 122 N on earth. (a) What is its mass (kg) on earth? (b) What is its weight (N) on Jupiter where the free-fall acceleration is 25.9 m/s2? (c) What is its mass (kg) on Jupiter?
Photons of wavelength 430 nm are incident on a metal. What is the work function of the metal
The peak value of the ac current in a circuit is 6.0 A, and peak value of the ac voltage applied to the circuit is 4.7 V. What is the average power delivered to the circuit?
A baseball approaches home plate at a speed of 48.0 m/s, moving horizontally just before being hit by a bat. The batter hits a pop-up such that after hitting the bat, the baseball is moving at 57.0 m/s straight up. The ball has a mass of 145 g and is..
Two resistors, 48.8 and 60.5?, are connected in parallel. The current through the 60.5-? resistor is 3.72A, What is the total power supplied to the two resistors
The distance between the endpoints is 2.79m and exactly 8 cycles are completed in 22.0 seconds. what is the radius, (in meters) and angular velocity of the circular motion
The morning sounding shows an is othermal layer from 800 to 700 mbat -11oC, and the temperature in the layer from 390 to250 mb decreases steadily from -47 to -55oC. What is the thickness of these layers?
A 100 m long solenoid has a radius of 0.050 m and 1.5 x 10^4 turns. Determine the self-induced emf in the solenoid due to the changing environment
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