Two carts slide along a frictionless track (their initial state is illustrated M= 50kg VM -0 m = 40 kg Vm =4 m/s 2m a) What is the velocity of the M = 50kg mass at the bottom (bofore they collide) VM b) They collide on the horizontal track, and stick together. What is their new common velocity? V = c) How many joules of heat was produced by this collision? E=
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- courses/ 352569_1/cl/outline?legacyUrl=~2Fwebapps~2Fblackboard~2Fcontent~2FlaunchAssessment.jsp%3Fcours Question Completion Status: O 44.3 m/s QUESTION 3 Why does an egg break if it is dropped from 1 meter onto hardened concrete but does not break if it is dropped from 1 meter onto a soft mattress? O The mattress increases the inertia of the egg and makes it more resistant to change so it doesn't break. O The mattress' cushioning increases the contact time with the egg and decreases the force acting on the egg, O The mattress' cushioning decreases the contact time with the egg and decreases the force acting on the egg. O None of these QUESTION 4 Using a block and tackle pulley, you need to lift 500 N of bricks a total distance of 4 meters. If you apply 200 N of force, how much rope will you have to pull to lift the bricks? O 10 mQuestion 4 #6418660 Two children on skates face each other when one of the children pushes back the breast of the other. Instantly, the two children begin to move in opposite directions. The physical principle that explains the phenomenon is: a) Stevin's principle. b) Archimedes' principle. C) Newton's third law. d) Snell's Law. e) The first Law of Thermodynamics.420 Granby be traveling at 30 meters per second has an inelastic collision with a 250 g block of clay that is at rest. Half of the babies kinetic energy becomes Heat. Calculate the joules of thermal energy after the Collision
- 2. A bicycle has a momentum of 24 kg•m/s. What momentum would the bicycle have if it had: a. twice the mass and was moving at the same speed? b. the same mass and was moving with twice the speed? c. one-half the mass and was moving with twice the speed? d. the same mass and was moving with one-half the speed? e. three times the mass and was moving with one-half the speed? f. three times the mass and was moving with twice the speed?Give explanations for the right answer. As the cart on a roller coaster rides goes up on a frictionless track ____. a. its velocity increases b. it produces heat c. its velocity decreases d. its velocity remains the sameA mass ma = 2kg slides down slippery ramp, reaching a speed v = 10 m/s at the bottom. After reaching the level ground ma collides with mass mg = perfectly inelastic collision. 3kg at bottom, sticking together in a a.) What was the height of the ramp, assuming that m, started from rest? b.) How fast were the combined masses ma and mg moving after sticking together? c.) The combined mass runs into a spring, which brings it to a stop after being compressed 7 cm. What is the spring constant k ?
- 19. Equation Jeopardy 1 The equations below describe one or more physical processes. Solve the equations for the unknowns and write a problem state- ment for which the equations are a satisfactory solution. -(0.001 kg)(9.8 N/kg) + 7 sin 88° 0 (-5.0 × 10-8 C)E, + T cos 88° = 08. In lab you submerge 50 grams of 55 °C nails In 50 grams of 28 °C water. What is the final temperature of the system (the specific heat of iron is 0.12 cal/g °C and the specific heat of water is I cal/g °C). 9. A shell of mass 8.7 kg is fired from a gun of mass 1200 kg, with a horizontal velocity of 450 m/s. Find the acceleration of the gun required to bring it to rest in a distance of 0.41 m.Q4 - If there is no transfer of energy between two objects, then their temperatures are a. Same b. Different c. infinite d. Zero
- Q4: When you are sick your body temperature may be 39.0oC, compared to normal body temperaturegiven by 36.8oC. It was observed that body increased 0.525 MJ of heat energy. Calculate your mass? Takespecific heat of human body as Chaman=3470 J/kgoC. Human body cannot survive without sufficient watercontent in body. Justify your opinion based on scientific knowledge. If you replace water content of bodywith some other liquid, what changes you can observe?19. * Equation Jeopardy 1 The equations be- low describe one or more physical process- es. Solve the equations for the unknowns and write a problem statement for which the equations are a satisfactory solution. - - (0.001 kg)(9.8 N/kg) + T sin 88° = 0 ( − 5.0 × 10¯³C)Ex + Tcos 88° = 0 -Q4: Consider the energy and fluctuation in energy of an arbitrary system at absolute temperature, Obtain an expression for E in terms of the derivatives of Inz.