Physics, 08.11.2019 05:31, Keemdadream13

# In soap box car races, the cars are boxes with wheels. they begin at rest at the top of a hill, and at the start of the race they all begin rolling down the hill. the soap box car that reaches the bottom of the hill first is the winner. you have entered a soap box car race where the rule is that all the wheels and cars must have equal mass. since you have taken physics, you know that it is worse to have wheels with spokes (where the mass is mostly on the rim) rather than solid wheels becausea.) the solid wheels are easier to paint. b.) the solid wheels have a higher rotational mass or moment of inertia and therefore will retain more rotational energy. c.) given the same torque, the wheels with spokes have a higher rotational mass or moment of inertia and therefore will have a greater angular acceleration. d.) given the same torque, the wheels with spokes have a higher rotational mass or moment of inertia and therefore will have a smaller angular acceleration. e.) given the same amount of energy, too small a fraction is converted into rotational kinetic energy of the wheels.

Answers: 3

Physics, 21.06.2019 15:30, jungcoochie101

What defines the mass number of an isotope? a. the sum of the neutrons and protons b. the sum of the neutrons and electrons c. the number of neutrons d. the number of protons

Answers: 1

Physics, 21.06.2019 16:30, rheamskeorsey33

A12-kg bag of groceries is tossed onto a table at 4.0 m/s and slides to a stop in 2.2 s . modify the equation fδt=δ (mv) to find the force of friction.

Answers: 2

Physics, 21.06.2019 18:50, NycLife

How does the image distance (di) of a convex lens compare with the image distance of a concave lens? a. the image distance of the convex lens is positive, and that of the concave lens is negative. b. both are negative for a virtual image. c. both are positive for a virtual image d. the image distance of the convex lens is negative, and that of the concave lens is positive.

Answers: 1

In soap box car races, the cars are boxes with wheels. they begin at rest at the top of a hill, and...

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