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A baseball is hit upward and travels along a parabolic arc before it strikes the ground. Which one of the following statements is necessarily true?
1. The acceleration of the ball decreases as the ball moves upward.
2. The velocity of the ball is 0 m/s when the ball is at the highest point in the arc.
3. The X component of the velocity of the ball is the same throughout the balls flight.
4. The acceleration of the ball is 0 m/s squared when the ball is at the highest point in the arc.
5. The velocity of the ball is a maximum when the ball is at the highest point in the arc.
A laser is mounted on a table 1.00m above the ground, pointed at a vertical mirror a horizontal distance 3.48maway. At what height does the reflected beam strike the wall
An airplane is flying with a velocity of 90 at an angle of 22 above the horizontal. When the plane is a distance 122 directly above a dog that is standing on level ground, a suitcase drops out of the luggage compartment.
A uniform meter stick is in static rotational equilibrium when a mass of 220g is suspended from the 5.0-cm mark, What is the mass of the meter stick
Five moles of an ideal monatomic gas with an initial temperature of 128 C expand and, in the process, evaluate the final temperature of the gas
A rock is suspended from a scale reads 20.0 N. A beaker of water is raised up so the rock is totally submerged in the water. What is the density of the rock
The 20-g centrifuge at NASA's Ames Research Center in Mountain View, California, is a horizontal, cylindrical tube 58 ft long. Suppose an astronaut in training sits in a seat at one end, facing the axis of rotation 29.0 ft away. Decide the rotation r..
a point charge q1=2 microC is located on the positive y axis at y=0.30 m, and an identical charge q2 is at the origin. Find the magnitude and direction of the total force
An object of mass 0.550 kg is lifted from the f loor to aheight of 3.50 m at a constant speed. How much work is done by the Earth on the object
An ideal transformer has 60 turns on its primary coil and 300 turns on its secondary coil. If 120 V at 2.0 A is applied to the primary, what current is present in the secondary?
a block of mass 0.64 kg is suspended by a string which is wrapped so that it is at a radius of 0.059 m from the center
A hydrolic lift (starting with both pistons at the same height) isused to jack a 970kg car 12cm off the floor in steps. The diameterof the output (lift) piston is 18cm and the input force is250N.
A battery is connected in series with a 0.27-? resistor and an inductor, Find the inductance of the circuit
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