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The force exerted on a 0.140 kg baseball by a bat changes from 0.0 N to 1.0 X 10^4 N over 0.0010 s, then drops back to zero in the same amount of time. The baseball was going toward the bat at 23 m/s.
(a) Draw a graph of force versus time. What is the average force exerted on the ball by the bat?
(b) What is the acceleration of the ball?
(c) What is the final velocity of the ball, assuming that it reverses direction?
An old covered bridge across a country stream weighs 89,200N. A large truck stalls 4m from one end of the 9.00-m bridge. What weight must each of the piers support
A generator utilizes a coil that has 160turns and a 0.65 T magnetic field. The frequency of this generator is 60.0 Hz, and its emf has an rms value of 120 V. Assuming that all turn of the coil is a square (an approximation), Decide the length of the ..
A horizontal steel pipe of diameter 50 mm is maintained at at a temperature of 500C in a large room where air and room temperature are at 25oC. Calculate the total heat lost by pipe per unit length
A 4.5kg box slides down a 4.6m -high frictionless hill, starting from rest, across a 2.4m -wide horizontal surface, What is the speed fo the box just before hitting the spring
a 1.70 kg block and a spring with a force constant of 955 nm are oriented vertically as shown below. initially the
The figure below shows the horizontal forces acting on a sailboat moving north at constant velocity, seen from a point straight above its mast. At the particular speed of the sailboat, the water exerts a = 389-N drag force on its hull and ? = 36.0°.
If you were to take a 60.0 cm long steel bar, and heated it to the point that it would try to expand by 0.50 mm,what is the pressure you would need to apply, to keep it from expanding
A 75 kilogram man is riding in a 610 kilogram elevator. The person is standing on a scale reading 4 kilogram more than the real mass of the man. Find what is the tension in the cable of the elevator
You measure an electric field of 1.31 x 106 N/C at a distance of 0.157m from a point charge. What is the magnitude of the charge
A 30 nF capacitor is in series with a 1.40 M ohms resistor. The capacitor is initially uncharged when the series combination is connected across a 24.0 V battery. find the maximum charge the capacitor will eventually attain
A pencil (mass 5.8g and length 8.3cm) is at first balanced so that it is sitting vertically on a flat table. If the pencil then falls, find its angular velocity just before it strikes the tabletop. Assume that the mass of the pencil is distributed un..
Explain why the electrostatic interaction in ionic solids would (if alone) result in the collapse of the crystal to zero size and what it is that prevents this collapse in real crystal ?
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