You push on your friend's car until you give it 3000 J of kinetic energy. How much work did you do?

If a balloon is taken outside on a very cold day, what will occur?

What is the relationship between the direction of motion of the balloon and the wind currents

The friction of the water on a boat produces an acceleration of -10. m/s2. if the boat is traveling at 30. m/s and the motor is shut off, how long it take the boat to slow down to 5.0 m/s?