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3. A billiard ball of mass 0.500 kg is rolling along a frictionless pool table with a velocity of 3.5 m/s. It then strikes another billiard ball of equal mass, initially at rest, which moves in a straight line with a velocity of 2.8 m/s.
a) What is the velocity of the first ball after the collision?
b) Is the collision elastic, completely inelastic, or partially inelastic?
4. A truck of mass 2575 kg moving at 11.0 m/s runs into the back of a car that is at rest and has a mass of 825 kg. The two vehicles slide off together.
a) Assuming friction can be ignored, find the velocity of the two vehicles after the collision.
b) Is the collision elastic, completely inelastic, or partially inelastic?
5. A 0.115 kg hockey puck, moving at 35.0 m/s strikes a 0.265 kg octopus sitting on the ice, thrown there by a hockey fan. The puck and octopus slide off together (they stick together). Find the velocity of the puck and octopus.
6. A car of mass 565 kg has a velocity of +25.0 m/s. It strikes a truck of mass 785 kg that has a velocity of +12.0 m/s (in the same direction) from behind. The two vehicles stick together. Find the velocity of the two vehicles after the collision.
7. A red dynamics cart of mass 0.250 kg is rolling with a velocity of 2.0 m/s when it strikes a blue
dynamics cart of mass 0.750 kg that is initially at rest. After the collision, the blue cart has a velocity of +1.0 m/s.
a) Determine the velocity of the red cart after the collision.
b) Is the collision elastic, completely inelastic, or partially inelastic?
Answers: 1
Physics, 21.06.2019 22:30
The percent efficiency of a machine can never be 100% (or greater), because in the real world some energy is always converted into a. heat b. work c. input force d. output force
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Physics, 21.06.2019 23:00
We want to calculate the total metabolic heat generated by a singing canary taking into account heat transfer by radiation, convection and exhaling air. the air temperature is 20 oc, canary’s body internal and surface temperature is 33oc, external body surface convective heat transfer coefficient is 25.2 w/m2 .k, temperature difference between the inhaled and exhaled air is 4.3 oc, the ventilation rate is 0.74 cc of air per second, specific heat of air is 1.0066 kj/kg.k and density of air is 1.16 kg/m3 . assume the canary’s body to be a cylinder with 7 cm diameter and 9 cm length, and heat exchange is from the side as well as the top and bottom of cylinder. calculate 1) the net rate of heat lost by radiation, assuming heat gained by the bird through radiation from the surroundings is 11.5 w; 2) rate of heat transferred by convection to the surrounding air; 3) rate of heat transferred in the exhaling air without considering any internal evaporation; 4) total metabolic power.
Answers: 2
Physics, 22.06.2019 14:30
Which compound is held together by the electrostatic force between two ions? a. co2 b. cci4 c. h2s d. mgf2
Answers: 1
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3. A billiard ball of mass 0.500 kg is rolling along a frictionless pool table with a...
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