Star x has twice the mass of the sun

Calculate the acceleration if you push with a 20 n horizontal force on a 4 kg block on a horizontal friction-free air table.

During the launch from a board, a diver's angular speed about her center of mass changes from zero to 6.90 rad/s in 250 ms. Her rotational inertia about her center of mass is 12.0 kg·m2. a.

What can we say about the rock as it falls to Earth? A) It accelerates as it falls. B) It falls at a constant rate of speed. C) It is at a constant velocity as it falls. D) It accelerates until it reaches a peak velocity, then decelerates.

How much current is in a circuit that includes a 9.0-volt battery and a bulb with a resistance of 4.0 ohms?

A different element has chemical properties that are similar to the properties of sodium. Which of the following statements about this element is probably true?

A person with a mass of 75 kg skis from rest down a slope at an angle of 31 degrees. The coefficient of kinetic friction of his skis on the snow is 0.095. What is his acceleration?

A velocity vs. time graph for an object is shown. A graph titled Velocity versus Time shows time in seconds on the x axis, numbered 0 to 5, velocity in meters per second on the y axis, numbered 0 to 5. A line starts at the origin and ends at (5, 5).

Could someone explain how to calculate the frictional force if a side force is placed upon an object?

A wire that has a resistance of 1Ω is to be built from an aluminum block of volume 1 cm3 . How long is the wire going to be?

What is the difference between exercise and fitness