Lecture on Gravity, Inertia and Friction www.assignmentpoint.com
Balanced or unbalanced? Gravity Inertia Friction Balanced or unbalanced? Action Reaction www.assignmentpoint.com
Gravity balanced UN BALL Speed (m/s) Ground Time (mSec) www.assignmentpoint.com
Inertia balanced UN PUTTER Speed (m/s) BALL Time (mSec) www.assignmentpoint.com
Friction balanced UN SKATE Speed (m/s) Time (Sec) www.assignmentpoint.com
A car is traveling down a hill A car is traveling down a hill. Which of the following will affect the amount of energy the car has? how long the car is the time of day how much the car weighs the color of the car www.assignmentpoint.com
causes physical deformation generates heat Friction the resistive force that occurs when two surfaces travel past each other. causes physical deformation generates heat www.assignmentpoint.com
the resistive force that occurs when two surfaces contact each other. Friction the resistive force that occurs when two surfaces contact each other. www.assignmentpoint.com
Oliver the dog doesn't want to walk in the rain Oliver the dog doesn't want to walk in the rain. He can make his owner pull harder on the leash to get him out the door by sitting on the vinyl floor. sitting on the tile floor. sitting on the carpeted floor. sitting on the wood floor. www.assignmentpoint.com
Pauline needs to measure the sliding friction of a brick Pauline needs to measure the sliding friction of a brick. How should she go about doing this? attach the brick to a string and then to a spring scale and read the force needed to quickly lift the brick off the ground drag the brick by a string attached to a spring scale so that it gradually speeds up drag the brick by a string attached to a spring scale along the surface of a table at a constant speed and read the force hang the brick from a string attached to a spring scale and read the force www.assignmentpoint.com
Sliding friction-the drag force created when the surface of one object slides across the surface of another object. Sliding Friction Lab Object Surface force (Newstons) www.assignmentpoint.com
terminal velocity gravity will accelerate an object until air resistance (friction) does not allow it to go any faster. gravity air resistance www.assignmentpoint.com
the ball with a mass of 75 kg the ball with a mass of 25 kg In the absence of air resistance, which of these objects will fall at the fastest rate when dropped? the ball with a mass of 75 kg the ball with a mass of 25 kg the ball with a mass of 10 kg They all fall at the same rate. www.assignmentpoint.com
Pressure is the amount of force exerted over a certain area. Pressure = Force Area www.assignmentpoint.com
Pressure = Force (newtons) Area (m2) 1 Pascal = 1 Newton/meter2 www.assignmentpoint.com
Work www.assignmentpoint.com
{ Work Distance W = f • d Force { Distance www.assignmentpoint.com