Physics Work,Power & Energy Level: Misc Level
A simple harmonic oscillator has a total energy E. a Determine the kinetic and potential energies when the displacement is one- half the amplitude. b. For what value of the displacement does the kinetic energy equal the potential energy?
Physics Work,Power & Energy Level: Misc Level
A slingshot consists of a light leather cup containing a stone. The cup is pulled back against two parallel rubber bands. It takes a force of 15 N to stretch either one of these bands 1.0 cm. a. what is the potential energy stored in the two bands together when a 50 g stone is placed in the cup and pulled back 0.20 m from the equilibrium position? b. with what speed does the stone leave the slingshot?
Physics Work,Power & Energy Level: Misc Level
A 5.0 kg block of aluminum is heated from 20 degrees C to 90 degrees C at atmospheric pressure. Find a. the work done by the aluminum, b. the amount of energy transferred to it by heat, and c. the increase in its internal energy.
Physics Work,Power & Energy Level: Misc Level
Rhonda keeps a 1.1 kg model airplane moving at constant speed in a horizontal circle at the end of a string of lenght 0.9 m. The tension in the string is 14 N. How much work does the string do on the planc during each revolution ? J
Physics Work,Power & Energy Level: Misc Level
A 808 kg automobile is moving at 26.6 m/s at a height of 5.0 m above the bottom of a hill when it runs out of gasoline . The car coasts down the hill and then continues coasting up the other side until it comes to rest.lgnoring frictional forces and air resistance, what is the value of h the highest position the car reaches above the bottom of the hill?
Physics Work,Power & Energy Level: Misc Level
A shooting star is a meteor that burns up when it reaches Earth s atmosphere. Many of these meteoroids are quite small. Calculate the kinetic energy of a meteoroid of mass 6.0 g moving at a speed of 48 km/s and compare it to the kinetic energy of a 1400 kg car moving at 29 m/s (65 mi/h).
M J( meteor)
M J( car)
Physics Work,Power & Energy Level: Misc Level
The figure shows two positions of bead sliding along a stiff wire track. The bead is released from rest at point A and comes to stop {momentarily} at point B. The heights of these points above the horizontal are 50 cm and 30 cm , respectively. The length of the wire between them is 400 cm. If the bead is 3. 0 g and the frictional force is approximately constant throughout the motion , find the value of this frictional force. watch your units. The picture is like a U with point A almost to the top on the left side of the U and the B point being two ards the lower part of the right side of the U
Physics Work,Power & Energy Level: Misc Level
A roller coaster is traveling on a horizontal track at 20 m/s. what is its speed after climbing a hill 15 m high? Ignore friction.
Physics Work,Power & Energy Level: Misc Level
A 1400 kg car is being towed. A net forward, horizontal force of 4500 N is applied to the car, initially at rest. lgnoring friction, what is the car s kinetic energy after it has traveled 100 m?
Physics Work,Power & Energy Level: Misc Level
The coefficients of static and kinetic friction for wood on wood are 0. 500 and 0. 300, respectively.A wooden box of 100 kg is at rest on a horizontal wooden floor. A horizontal force" just enough" to get the box moving is applied and then maintained after the box begins to move. what is the resulting acceleration of the box?
Physics Work,Power & Energy Level: Misc Level
150 joules of energy is added to a system that has 75 joules of work done on it.
Physics Work,Power & Energy Level: Misc Level
75 joules of energy is removed from a system that has 50 joules of work done on it.
Physics Work,Power & Energy Level: Misc Level
100 joules of energy is added to a system that does 40 joules of external work.
Physics Work,Power & Energy Level: Misc Level
# Calculate the change in internal energy for each of the following systems:
Physics Work,Power & Energy Level: Misc Level
Find the work that must be done on a 6000 kg car to decrease its speed from 45 m/s to 25 m/s (Remember 1 hp = 550 ft - lb - s = 746 w)
