You are riding an elevator that is moving upward with 3 m/s and slowing down at . Your real weight is 490 N. Your apparent weight is

The graph of the position of a DNA molecule (on the vertical axis) vs. time (on the horizontal axis) is a straight line that does not go through the origin and does not have a slope of zero. Which statement is true?

An object of mass m is at rest on a horizontal surface, and the coefficient of static friction is and kinetic friction . If a force F is applied to the object as shown and it remains at rest, then it must be true that

Two forces, one with magnitude 10 N and the other with magnitude 15 N, are directed as shown in the diagram below. What is the magnitude of a third force which would exactly balance these two forces, so that the sum of all three forces would be zero?

A sphere and a cube have the same volume. If the edge of one side of the cube is 5.00 cm, then what is the surface area of the sphere?

A fellow student found in the performance data of his new car the velocity-versus-time graph shown in the figure. The average acceleration of his car from second 0 to second 24 is

An object with mass m is hanging from a wire attached to the ceiling of an elevator. The elevator is moving downward and its speed is increasing at rate of . Which one of the following statements is true?

A mass attached to a horizontal spring, and resting on a frictionless surface is free to oscillate back and forth. Suppose the spring is stretched a distance 2d from equilibrium, and released. As the mass passes through the origin, how does its speed compare to the same mass and spring if stretched initially only a distance d from equilibrium?

Given that the gravitational acceleration on the surface of the Moon is one-sixth that on the surface of the Earth, which of the following objects has the most mass?

A ball attached to the end of a string is swung around in a circular path of radius r. If the radius is doubled while the angular speed is kept constant,