QQ: Are speed, velocity, and acceleration the same thing QQ: Are speed, velocity, and acceleration the same thing? Does it really matter when you use each term or are they interchangeable? Explain why you think this.

Objective: I understand the relationship between speed, direction, distance, and time.

Book# Trial 1 2 3 4 5 Avg 6 Prediction:

Form a ramp by placing 1 end of a board on a stack of six science books.

Release a marble at the top of the ramp Release a marble at the top of the ramp. Measure and record the time it takes to reach the bottom.

Repeat 4 more times. Record. Average your data.

How many books tall would the stack have to be to double the time needed for the marble to reach the ramp’s bottom? Record your prediction.

Test your prediction. Remove books one at a time. Roll the marble and measure the time it takes for it to reach the bottom. Repeat 4 more times. Find the average. Continue until 1 book is tested.

Analyzing Data: Marble & Books How close was your prediction? Did this surprise you? What would happen to the time needed for the marble to roll down the ramp if it were nearly horizontal?

3. If you keep adding books to. the stack, will the time 3. If you keep adding books to the stack, will the time needed for the marble to roll down the ramp decrease indefinitely? Explain.

Virtual Speed Lab 1) What information did you have before the lab was run?

D = vt