What force causes riders to feel heavy and weightless on a roller coaster?

a. the force of gravity

c. the normal force

b. a combination of air resistance and friction

d. None of the above.

Rounded to the nearest whole number, how many electrons are in an atom of zirconium? 40 51 91 131

A definition of power is * O Work divided by time O Work multiplied by time O Force multiplied by mass O Force multiplied by distance

A wheel rotating with a constant angular acceleration turns through 19 revolutions during a 3 s time interval. Its angular velocity at the end of this interval is 18 rad/s.

An elephant pushes with 2000 N on a load of trees. If it takes the elephant 45 seconds to move trees 15 meters, how much power did the elephant generate?

The initial velocity of a car moving on a straight road is 2.0 m s^-1 and becomes 8.0 m s^-1 after travelling for 2.0 s under constant acceleration. What is the acceleration?

Jack drops a stone from rest off of the top of a bridge that is 24.4 m above the ground. After the stone falls 6.6 m, Jill throws a second stone straight down. Both rocks hit the water at the exact same time.

How is Electric current able to flow?

In a series circuit, loads which have the same voltage dropped across them will have?.

When a brick is dropped from the roof of a house, it lands on the ground with a speed v. What will the speed at ground level be for an identical brick dropped from a roof twice as high as the first one?

The scientific method begins with recognizing a problem. The recognized problem in this scenario is, "Why is the printer in the office not working?" Choose the hypotheses that are testable and from which an experiment can be formed.