fill out these

1. a vector quantity always has and

2. acceleration in the direction an object is moving the motion of the object.

3. the tendency of an object to remain at rest or to continue in constant motion is its

4. when two balls collide, the momentum of the balls after the collision is determined by the

5. kinetic energy depends on mass and

!

An object with initial temperature 130 ∘ f is submerged in large tank of water whose temperature is 50 ∘ f . find a formula for f ( t ) , the temperature of the object after t minutes, if the cooling constant is k = − 0.2 . remember newton's law of cooling (the rate of change of temperature with respect to time is equal to k times the difference between the temperature of the object and the surrounding temperature) ! : )