Select ALL of the following statements that provide evidence that there is friction acting on a cart moving along a level track. [you can pick more than one answer!] The cart slows down while moving down the track

The cart's speed increases only when the hand is in contact with the cart

The temperature of the track increases as the car moves over it

The wheels are warmer after the cart moves down the track

when two balls of the different masses are dropped from equal height, they reach the ground at the same time .this is because they experience the same acceleration.

the acceleration is independent of mass.

thus when they are dropped they will always maintain the same velocity and travel the same distance (neglect air resistance of course) at the same time.

we have been given a quadratic function and we need to restrict the domain such that it becomes a one to one function.

we know that vertex of this quadratic function occurs at (5,2).

further, we know that range of this function is .

if we restrict the domain of this function to either or , it will become one to one function.

let us know find its inverse.

upon interchanging x and y, we get:

let us now solve this function for y.

hence, the inverse function would be if we restrict the domain of original function to and the inverse function would be if we restrict the domain to .

explanation:

wheres the pic