6.2 Acceleration and Forces

Acceleration

• forces acting on an object that combine to produce a net force equal to zero
• forces acting on an object that combine to produce a net nonzero force
• change in velocity divided by teh time interval inwhich the change occurred
• the force between two objects in contact that opposes the motion of either object

Force

• the cause of acceleration, or change in an object's velocity
• forces acting on an object that combine to produce a net force equal to zero
• forces acting on an object that combine to produce a net nonzero force
• the force between two objects in contact that opposes the motion of either object

balanced forces

• the cause of acceleration, or change in an object's velocity
• forces acting on an object that combine to produce a net force equal to zero
• forces acting on an object that combine to produce a net nonzero force
• the force between two objects in contact that opposes the motion of either object

unbalanced forces

• the cause of acceleration, or change in an object's velocity
• forces acting on an object that combine to produce a net force equal to zero
• forces acting on an object that combine to produce a net nonzero force
• the force between two objects in contact that opposes the motion of either object

Friction

• the cause of acceleration, or change in an object's velocity
• forces acting on an object that combine to produce a net force equal to zero
• the force between two objects in contact that opposes the motion of either object
• forces acting on an object that combine to produce a net nonzero force

Calculate the average acceleration of a car that changes speed from 0 m/s to 15 m/s in 5 s.

• 2 m/s^2
• 3 m/s^2
• 4 m/s^2
• 5 m/s^2

Why does placing wheels under a heavy box reduce the necessary force required to push it along at a constant speed?

Calculate the acceleration of a ball that starts from the rest and rolls down a ramp and gains a speed of 25 m/s in 5 seconds.

A dragster going at 15 m/s north increases its velocity to 25 m/s north in 4 seconds. What is its acceleration during this time interval?

What is the acceleration of an object traveling with a velocity of 36 m/s in 6 seconds?