Review of Force Unit

Draw a picture to solve this problem A box is being pushed by two stellar science students, one on each side of the box. Dalton is pushing the box with a force of 10N to the left. Kylee is pushing the box with a force of 15N to the right. Who is the stronger individual? What is the net force? In what direction is the box moving?

Draw a picture to solve this problem During tug of war Janelle felt she was a supergirl and attempted to beat Jack. Janelle with one hand on the rope and the other at her side applied a 100N force to the left, while Jack applied a 100N force with both hands to the right. What is the net force and direction on the rope?

Draw a picture to solve this problem Janelle finally decided to take this seriously and put both hands on the rope and applied a 150N force to the left, while Jack still struggled with his 100N force to the right. What is the net force and direction of motion for the rope?

Friction What are some ways you can reduce friction? Using lubricants, like oil in a car engine Do you want to completely eliminate friction? Why? No, it would be difficult to even walk without friction between feet and the ground Friction depends on the types of ____surfaces_____ involved and how __hard_ the surfaces push together.

Name the type of friction

Name the type of friction

Name the type of friction

Name the type of friction

Name the type of friction

Name the type of friction

Name the type of friction

Name the type of friction

Name the type of friction

Name the type of friction

Name the type of friction

What force is the following example of? Centripetal force

What force is the following example of? inertia

What force are the following examples of? Centripetal force

The picture below shows air resistance, what type of friction is this?

Name the law

Name the law

Name the law

Name the law

Name the law

Name the law

Name the law

Name the law

Name the law

What unit is used for weight? Newton, because it is a force

How can you increase acceleration? Increase the force Decrease the mass

How can you increase the momentum of an object? By increasing the mass By increasing the velocity Or you can increase both

Momentum of an object is in the same direction as its ___________. velocity