Question

Free body diagrams FBD’s are used to find the net force on an object by vector addition 1. Draw your x and y coordinate axes 2. Draw a dot representing the object under consideration 3. Identify all forces acting on the object. Draw and label vectors starting at the object for each force acting on it. Make sure you consider their magnitude and direction If the acceleration is known we can use the FBD to determine an unknown force (work backwards), by determining the net force. Make sure you don’t include forces for which the object is the agent! Always, please make sure you show your show and explain your reasoning. Problem 1): Two ice skaters are travelling at a constant speed of 10 m/s to the north on a patch of ice that has had water poured on it so that it is effectively frictionless (there is also no air resistance). Skater A has a mass of 60 kg and the Skater B’s mass is 65 kg. a) What is the net force on each skater? b) The skaters both directly hit the wall of the ice rink and come to a stop in the same time interval. Which skater if either experiences a larger force from hitting the wall?

          Free body diagrams

FBD’s are used to find the net force on an object by vector addition
1. Draw your x and y coordinate axes
2. Draw a dot representing the object under consideration
3. Identify all forces acting on the object. Draw and label vectors starting at the object for each force acting on it. Make sure you consider their magnitude and direction

If the acceleration is known we can use the FBD to determine an unknown force (work backwards), by determining the net force.

Make sure you don’t include forces for which the object is the agent!

Always, please make sure you show your show and explain your reasoning.

Problem 1):
Two ice skaters are travelling at a constant speed of 10 m/s to the north on a patch of ice that has had water poured on it so that it is effectively frictionless (there is also no air resistance). Skater A has a mass of 60 kg and the Skater B’s mass is 65 kg.

a) What is the net force on each skater?
b) The skaters both directly hit the wall of the ice rink and come to a stop in the same time interval. Which skater if either experiences a larger force from hitting the wall?

Free body diagrams

FBD’s are used to find the net force on an object by vector addition
1. Draw your x and y coordinate axes
2. Draw a dot representing the object under consideration
3. Identify all forces acting on the object. Draw and label vectors starting at the object for each force acting on it. Make sure you consider their magnitude and direction

If the acceleration is known we can use the FBD to determine an unknown force (work backwards), by determining the net force.

Make sure you don’t include forces for which the object is the agent!

Always, please make sure you show your show and explain your reasoning.

Problem 1):
Two ice skaters are travelling at a constant speed of 10 m/s to the north on a patch of ice that has had water poured on it so that it is effectively frictionless (there is also no air resistance). Skater A has a mass of 60 kg and the Skater B’s mass is 65 kg.

a) What is the net force on each skater?
b) The skaters both directly hit the wall of the ice rink and come to a stop in the same time interval. Which skater if either experiences a larger force from hitting the wall?

Added by Angela V.

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