Describe the different between average speed and constant speed

average would be all your speeds divided by certain amounts of time and divided by the amounts of time you divided it into  constant speed is is no going any faster or slower no acceleration.

Explanation:

constant speed means that there is no acceleration. For example a car moving at 50 mph is going at a constant speed, but a car that is standing still on the road and speeds up to 50 pmh is in a constant state of acceleration. Once the car reaches 50 mph there is zero acceleration and you are moving at a constant speed.     Constant speed

The average speed of an object is the total distance traveled by the object divided by the elapsed time to cover that distance. It's a scalar quantity which means it is defined only by magnitude. A related concept, average velocity, is a vector quantity.       Average speed

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b. lifting dumbbell weight at 20-degree angle from the body after a 45-degree angle