Forces
What is a force?
A push or pull that can change the motion of an object.
What is the first step in planning an investigation?
Define the question or purpose of the investigation.
What tool can you use to measure distance during an experiment?
A ruler or a measuring tape
How can you show that faster objects have more energy?
Use a ramp to roll objects of the same weight but different sizes.
Name two types of forces.
Friction, magnetism, and gravity.
What variable would you change to study speed and energy?
The speed of the object.
How do you ensure your measurements are accurate?
Repeat the experiment multiple times.
What experiment can demonstrate how speed affects energy?
Drop balls from different heights and measure their speed on impact.
How do forces affect the speed of an object?
Forces can increase, decrease, or redirect the speed.
How do you choose a hypothesis for this type of investigation?
Research your topic or use prior knowledge to create a question about what you think will happen
How many variables are you allowed to change when conducting and investigation?
one
How does changing the weight of an object affect the outcome of the energy experiment?
Demonstrate by rolling objects of different weights down a slope and measuring their speed at the bottom.
Explain the relationship between force and acceleration.
More force equal more acceleration, less force equals less acceleration.
What safety precautions should you consider if you were testing the effect of gravity on a ball in a sand pit by dropping the ball in the sand?
Safety goggles
How do you collect data on during and investigation?
Record all observation and data in a journal. Answers may vary.
Set up a demo using a spring-loaded launcher to vary the speed of an object
Show how different tensions on the launcher affect the speed and distance an object travels.
The force applied to a car was 100 newtons. What would you expect to happen if the force was increased to 500 newtons?
The speed of the car would increase and the distance the car moved would increase.
What step of the planning process involves analyzing the data from the investigation.
Conclusion
A scientist began doing a ramp investigation that test the effects of a car rolling down a ramp on different surfaces. What would the scientist do if the results came out with unexpected data.
Redo the investigation to verify accuracy.
Design an experiment to compare the mechanical energy of objects moving at different speeds but the same mass.
Use a track to slide objects at different initial speeds and measure their final kinetic and potential energies at various points.