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Q. A loaded grocery cart is rolling across a parking lot in a strong wind. You apply a constant force. You apply a constant force F = 26i - 45j to the cart as it undergoes a displacement s = 9.2i - 2.5j. How much work does the force you apply do on the grocery cart?
Q. The magnetic field of the earth at a certain location is directed vertically downward and has a magnitude of 50.0 µT. A proton is moving horizontally toward the west in this field with a speed of 6.40 106 m/s. What are the direction and magnitude of the magnetic force the field exerts on the proton?
The speedometer of a truck shows the linear velocity of the truck but actually measures the angular velocity of the wheels and converts that to the linear velocity. If the tires are changed out and larger diameter tires replace the stock tires, does ..
A guitar string is 90cm long and has a mass of 3.6g from the bridge to support post (L) is 60cm and the string is under the tension of 560. What are the frequencies of fundamental and first two overtones.
Assume that the temperature of the bullet doesn't change appreciably, how much ice is melted as a result of the collision.
Find the force exerted by the plane on the pilot
A small rocket to gather weather data is launched straight up. few seconds into the flight, its velocity is 110 and it is accelerating at 17 . At this instant, the rocket's mass is 50 and it is losing mass at the rate of 0.45 as it burns fuel.
Two equal charges Q are positioned at points (x=l, y=0) and (x=-1, y=0).Find where the field is a maximum. define your answer in terms of the variables , , and appropriate constants. If there is more than one answer, separate them by a comma.
A cardinal (Richmondena cardinalis) of mass 3.60×10-2 and a baseball of mass 0.146 have the same kinetic energy. What is the ratio of the cardinal's magnitude of momentum to the magnitude of baseball's momentum.
A uniform solid disk with a mass of 23.8 kg and a radius of 0.712 m is free to rotate about a frictionless axle. Forces of 92.0 and 124 N are applied to the disk. Taking the clockwise direction to be the negative direction, what is (a) net torque pro..
If a freight train can accelerate at 0.050 m/sec2, how far must it travel to increase its speed fro 2.0 to 8.0 m/sec?
An ocean liner leaves New York City and travels 56.0° north of east for 170 km. How far east and how far north has it gone? In other words, what are the magnitudes of the components of the ship's displacement vector in the following directions.
The mass m =1 kg is set up as a pendulum of length 0.6m as shown on the diagram. Initially in the position of h = 0.2m above the lowest point, and the pendulum is given initial speed of 1m/s. What is the largest mass M that might be temporarily lifte..
A 47 g golf ball is driven from the tee with an initial speed of 50.0 m/s and rises to a height of 24.8 m.
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