All of the following objects are moving at the same speed. which one bas the greatest kinetic energy? (remember kinetic energy depends on mass and speed)

a. car

b. semi tractor-trailer truck

c. motorcycle

d. bicycle

A test car starts from rest on a horizontal circular track of 85-m radius and increases its speed at a uniform rate to reach 115 km/h in 13 seconds. Determine the magnitude a of the total acceleration of the car 11 seconds after the start.

Which properties can be inferred from the star's orbital period?

Scientists have observed that Earth's tectonic plates move in predictable directions. What is the cause of this observation?

Which information is necessary to determine an object's speed? A. distance and period of time B. distance and change in position C. period of time and direction D. distance and direction

How does an object's mass affect its inertia? A) Increasing an object's mass decreases its inertia. B) Increasing an object's mass will increase its inertia. C) There will be no effect on its inertia.

A student is trying to calculate the density of a ball. She already knows the mass, but she needs to determine the volume as well. Which of the following formulas can be used to calculate the volume of the ball?

Is there such a thing as real time weather radar? why not?

Luke and Carrie are driving down a straight section of the interstate at 70 mph in Luke's new convertible. Carrie is drinking a soda in the passenger seat.

A force produces power p by doing work w in a time t. what power will be produced by a force that does six times as much work in half as much time?

A batter hits a baseball with a bat. The bat exerts a force on the ball. Does the ball exert a force on the bat?