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A 0.155 kg baseball pitched horizontally at 30.0 m/s strikes a bat and is popped straight up to a height of 32.0 m.
1) If the contact time between bat and ball is 1.5 ms, calculate the magnitude of the average force between the ball and bat during contact.
2) Find the direction of the average force on the ball. (in degrees from the initial direction of motion of the ball)
two long charged thin-walled concentric cylinders have radii of 3.0 and 6.0 cm. the charge per unit length is 6.50 10-6
On a cold day, a heat pump absorbs heat from the outside air at 14°F (-10°C) and transfers it into a home at a temperature of 86°F (30°C)
question1a blocks slides all along a track that descends through distance h. the track is frictionless except for the
A rotating rod that is 15.3 cm long is spun with its axisthrough one end of the rod so that the other end of the rod has aspeed of 2010m/s(4500mph). What is the centripetal acceleration of the end of the rod?
A moon orbits a planet of unknown mass with a period of 1.8 days. If the radius of the moon's orbit is 420,000,000 meters, find the mass of the planet
In the figure below, a frictionless roller coaster car of mass m tops the first hill with speed v0 at height h. What is the speed of the car at (a) point A, (b) point B, and (c) point C? (d) How high will the car go on the last hill, which is too hig..
Two negative, equally charged drops of water, 0.80 mm apart, exert an electrostatic force of 78.5 x 10-9 N on each other. Determine the net charge on each drop.
The Tevatron at the Fermi National Laboratory (Fermilab) west of Chicago is a particle accelerator capable to produce protons at a total energy of one teraelectronvolt i.e. 1 TeV. What is the Lorentz gamma factor for these protons
An electric motor can accelerate a 4-kg grinding wheel in a form of a solid disk of radius 0.2 m from rest to 75 rad/s in 15 s. Find the torque generated by the motor
You're working on a new high-speed rail system. It uses 6000-horsepower electric locomotives, getting power from a single overhead wire with resistance 15 mOhms/km, How far from the power plant can the train go and still meet this standard
When two parallel slits are illuminated with monochromatic light of wavelength 632.8 nm, What is the distance between the parallel slits
a student pulls a 5kg object along a horizontal surface at a constant speed of 2m/s by a 15N force acting 30 degrees above the horizontal
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