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A 20kg box slides 45m from the top down to the bottom of an incline that is 10 degrees to the horizontal. The box is stationary at the top of the slope and is accelerating down the slope at a rate of 1.0m/s^2.
a. How much work is done by the force of gravity on the box?
b. Howm uch work on the box is done by the frictional force?
c. What is the kinetic energy of the box at the bottom of the slope?
d. How much gravitational potential energy has the box lost while traveling down the slope?
A student stands at the edge of a cliff and throws a stone horizontally over the edge with a speed of 17.0 m/s. With what speed and angle of impact does the stone land
Starting from rest, a disk rotates about its central axis with constant angular acceleration. In 5.0 s, it rotates 45 rad. What is the instantaneous angular velocity of the disk at the end of the 5.0 s
A softball of mass 0.200kg that is moving with a speed of 7.0m/s collides head-on and elastically with another ball initially at rest, Calculate the mass of the target ball
At the instant shown, the spring is unstretched and B is moving downward at 4 ft/s. Use conservation of energy to identify velocity of B when it has moved downward 2 ft from its current position.
Most materials will expand when the temperature is increased. The change in size will depend on several factors, including the original size, What is the fractional change in length
7.84 g of argon gas at an initial pressure of 4.34 atm and at 16°C undergo an isobaric expansion until the volume has increased in five times. What is the volume of the gas after expansion
an electron is shot directly toward the center of a large metal plate that has surface charge density -1.00 × 10-6 C/m2. how far from the plate must the launch point be
If the coefficient of volume expansion of mercury is 18x10(^-5) (K^-1), what is the coefficient of volume expansion in the glass?
The force of the wind on the sails of a sailboat is 410 N north. The water exerts a force of 240 N east. If the boat (including crew) has a mass of 330 kg, illustrate what are the magnitude and direction of its acceleration?
Ann was reaching up to grab a box of cereal that was on top of the refrigerator. She had extended her arm as well as stood on her tip-toes to reach the box. Which primary muscle allowed Ann to extend her elbow and which 2 primary muscles allowed h..
An infinitely long line of charge has a linear charge density of 5.50×10-12 C/m. A proton is at distance 17.5 cm from the line and is moving directly toward line with speed 2900 m/s.
A sound wave moving through water has a frequency of 256Hz and a wavelength of 5.77m.What is the speed of sound in water.
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