01.03 The Laws of Motion Worksheet

Instructions: For this assignment, describe Newton’s laws of motion while skateboarding. Next, study the graph of distance traveled to determine if the skateboarder is on a dry, wet, or muddy road condition. Describe how these conditions affect the motion of the skateboard. Then, complete the table by calculating the acceleration of the skateboard on each road condition.

The simulation shows skateboarding animation:
Condition, Speed, Result
Dry, 10 mph, The skater makes it over the ramp without any problems.
Wet, 10 mph, The skater makes it over the ramp and continues past the ramp.
Muddy, 10 mph, The skater makes it to the ramp but only makes it to the top of the ramp.

Part 1: Newton’s Laws
Observe the virtual skateboarder coming down the hill and over the ramp. Describe how each of Newton’s laws of motion can be observed in this action. You can choose the dry, wet, or muddy condition, or some combination of these.

• Newton’s First Law of Motion

• Newton’s Second Law of Motion

• Newton’s Third Law of Motion

Part 2: Analyze
The graph below shows the distance traveled by the skateboarder on each of the different road conditions. Using the graph, determine which of the roads was dry, wet, or muddy. Explain your answer using complete sentences.

Graph shows:
Road A = 8 meters distance
Road B = 2 meters distance
Road C = 12 meters distance

• Road A

• Road B

• Road C

Part 3: Calculations
Using the given data table, calculate the acceleration of the skateboarder. You can use either form of the equation below.
- acceleration = net force/mass
- force = acceleration x mass

Road A Road B Road C
Acceleration (m/s2)
Mass of person and skateboard (kg) 62 62 62
Force (N) 480 240 600

What would you expect to happen to the acceleration if all friction were removed from the ramp, making the net force even higher than 600 N?

What is the order of the moon, earth, and sun in a lunar eclipse and a solar eclipse?

Follow these directions and answer the questions. 1. shine a pencil-thin beam of light on a mirror perpendicular to its surface. (if you don't have a laser light as suggested in the video, you can make a narrow beam from a flashlight by making a cone from black construction paper and taping it over the face of the flashlight.) how does the light reflect? how does the relationship of incident to reflected ray relate to the reflection of water waves moving perpendicular to a barrier? 2. shine a pencil-thin beam of light on a mirror standing on a sheet of paper on the table (or floor) so that you can mark the incident ray and reflected ray. (you can support the mirror from the back by taping it to a wooden block.) 3. mark a line on the paper representing the reflective surface. (the reflective surface of a mirror is usually the back edge.) 4. draw a dashed line perpendicular to the mirror surface at a point where the incident and reflected ray meet. this perpendicular is called a normal to the surface. 5. measure the angles between the rays and the normal. the angle of incidence is the angle formed by the incident ray and the normal to the surface. the angle formed by the reflected ray and normal is called the angle of reflection (r). what is the angle of incidence? what is the angle of reflection? 6. repeat for several different angles. (see report sheet for details.) what appears to be the relationship between the angle of incidence and angle of reflection? in science 1204, what was the relationship for these two angles made by the reflection of waves in a ripple tank? 7. roll a ball bearing so that it hits a fixed, hard surface (a metal plate) at several angles (including head-on). observe the way in which the ball bearing reflects. what generalization can you make about how a ball bearing reflects from a wall? have you proved that light can only behave like a wave?

Which type of wave can travel without a medium