An model car accelerator from rest to speed as in 105. A newer model car acceler

Question

An model car accelerator from rest to speed as in 105. A newer model car accelerates from rest to speed 20 in the same period of time. Both cars have the mass Assume all the energy from the engine appear as kinetic energy of the cars. Compare the of the two cars. If two particles of mass m_1, and m_2 (m_1 > m_2) have velocities v_1 and v_2 such that they have equal kinetic energies. Which particles has the larger momentum. Show your work. A clock worker loading crates on a ship, applies an horizontal for a of 50N to keep a 15 kg crate moving at constant speed on level ground. Find the coefficient of kinetic friction. Find the tension in each cable supporting the 600N Cat Burglar in the figure.

Explanation / Answer

b)

since they have same kinetic energy

kinetic energy = 0.5 P12/2m1

kinetc energy os second partcle = 0.5 P22/2m2

since m1>m2

P1> P2

momentum of m1 is greater than momentum of m2

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