Two point charges having charges q1=5 µC and q2=7 µC and masses m1=2 grams and m2=3 grams, respectively, are released (in deep space) from rest when they are r=21 cm apart. Determine how fast each charge will be moving when they are very far apart frome each other.
A 2.4 kg block is dropped on to a spring of spring constant 3995 N/m from a height of 5.0 m. When the block is momentarily at rest, the spring has been compressed by 25 cm. Find the speed of the block when the compression of the spring is 15 cm. Use the principle of energyconservation in the analysis and solution.
The first energy crisis in the U.S occurred in 1973. In response many new devices were created and many installed. Today, companies appear to be disinterested in energyconservation despite the rule of thumb that 50% of the energy expense can be saved with basic conservation devices. Why would companies not be interested in avoi
Question: A 16-kg sled is being pulled along the horizontal snow-covered ground by a force of 24 N. Starting from rest, the sled attains a speed of 2.0 m/s in 8.0 m. Find the coefficient of kinetic friction between the runners of the sled and the snow.
When an average force F is exerted over a certain distance on a shopping cart of mass m, its kinetic energy
increases by 12 mv2.
(a) Use the work-energy theorem to show that the distance over which the force acts is mv2/2F.
Am I on the right track? UGH so very frustrated!
Kinetic energy = 1/2 mass x speed2
KE = 1/
A spring fixed at one end is compressed from its relaxed position by a distance of 0.20 m. See the graph of the applied external force, Fx, versus the position, x, of the spring. (graph is attached)
(a) Find the workdone by the external force in compressing the spring 0.11 m starting from its relaxed position. (answer in Jou
The plates of a parallel plate capacitor are 1 mm apart, each has an area of 1000 cm^2, and they are kept connected across a 600 V battery. Take the medium to be air (Ke = 1).
(a) If the plates are moved apart until the separation is 2 mm, how much mechanical work is doneand how much energy is returned to the battery?
Please see the attachment.
For the apparatus pictured below, one ball swinging in at a speed of 2vo will not cause two balls to swing out with speeds vo. (a) Which law of physics precludes this situation from happening, the law of conservation of momentum or the law of conservation of mechanical energy? (b) Prove this law ma
How do you determine the speed just before blocks collide? How do you determine the temperature rise that results from the collision? How do you determine the additional thermal energy that is generated as the blocks continue to move together after the collision?
A 2.00-g bullet hits and becomes embedded in a 5.00-kg wood block which is hanging from a 1.20-m long string. This causes the block to swing to a height of 2.24mm. What was the speed of the bullet before it hit the block?