Forces and Motion Review

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Presentation transcript:

Forces and Motion Review

Sum of Forces What is the Equation for the Sum of Forces?

Answer Applied force – friction force = Sum of forces

Sum of forces I have a applied force of 723N to the left and a friction force of 540N. What is the sum of forces?

Answer 723N – 540N = 183N to the left

Forces Forces have __________________ and ________________________.

Answer Forces have direction and magnitude.

Equal or unequal force? 50 N 50 N

Answer Equal force-If the forces are equal then the sum of forces will be 0. The object won’t move.

Equal or unequal 150N 50 N

Answer Unequal-The force to the left is bigger then the force to the right.

Friction . __________ friction occurs when a body is forced to move along a surface but movement has not started yet.

Answer Static friction

Friction . ___________ friction occurs when the applied force is greater than the frictional force. This causes the object to move along the surface.

Answer Sliding friction

Friction ___________ friction is a combination of frictional forces at the point of contact with the wheel and the ground/surface of a rolling object

Answer Rolling Friction

Distance vs time Which line represents the fastest speed? miles Minutes

Answer Line c-d has movement of 9 miles in 4 minutes

Distance vs. time What line has a slope of 0? What does that mean?

Answer Line b-c has a slope of 0 and it means that they are not moving. Time is passing but the distance is not changing.

_______________________force is the support force exerted upon an object that is in contact with another stable object.

Anwser Normal force

A kid is pushing a box across a room at a constant velocity in a rightward direction. Draw a force diagram.

A student flicks a paper football across the table in a leftward direction and leftward acceleration. Draw a force diagram.

Create a story that has at least 4 different events (lines) Create a story that has at least 4 different events (lines). Then graph it on the back. Make sure your graph is labeled