Rc Force & Motion

Which of the following formulas is used to find ACCELERATION?

• Mass/Force 
• Force/Mass
• Mass x Force

When 2 OPPOSING forces are acting on an object, to find acceleration you must first do this.

• Determine the object's speed 
• Find Net force by subtracting the smaller force from greater 
• Determine what the object is made out of
• Find Net force by adding the forces together

How can the work being done in this image be done with less effort?

• Move the fulcrum closer to the force 
• Move the force to the end of the ramp 
• Move the fulcrum closer to the load 
• Move the fulcrum to the end of the ramp

Which of the following MUST be present for work to be completed?

• the object moves in the direction the force is applied 
• an element of time 
• as long as there is a force being applied, work is being done
• the object moves in any direction

What is the best explanation as to why a pulley makes work easier?

• they make the load lighter, thus easier to move
• they decrease the force needed to move an object
• they change the direction of the force needed to do work 
• they decrease the distance an object must be moved

Without this, "work" is not being performed?

• effort
• force
• movement 
• both a force and movement 

True or False: An object's mass has NO AFFECT on the object's rate of acceleration.

• True- mass does NOT affect acceleration rate
• False- Smaller the mass= Faster the acceleration rate 
• False- Greater the mass= Faster the acceleration rate

For an inclined plane (ramp) to make work easier, which must be TRUE of the inclined plane?

• it must cover a longer distance 
• it must be really steep
• it must cover a shorter distance
• it must be vertical

At what point is there the greatest amount of kinetic energy? *pendulum swinging from point A to point D

• point A 
• point B 
• point C
• point D

True or False: A curved line on a Position vs Time graph indicates a constant speed

• True
• False