Newton’s Laws of MotionForce & Acceleration

Learning Objectives• Analyze relationships between forces and

motion• Calculate the effects of forces on objects

Newton’s Laws of Motion

• Newton’s second law of motion – states that the acceleration (a) of an object is directly related to the net force on the object (Fnet) and inversely related to the mass of the object (m)

• Units of newtons can be broken down using Newton’s second law

Force & Acceleration

Force & Acceleration Example

Ex) A 91 N force causes an object to accelerate at 0.76 m/s2. What is the mass of the object?

IV. Conversions needed?

V. Intermediates needed?

VI. Solve

VII. Does the result make sense?

I. StrategyII. Given and unknown

III. Formula

so

No.

No.

Yes.

Force & Acceleration Example

Ex) A 250 N net force is applied to a 72 kg object. What is the acceleration of the object?

IV. Conversions needed?

V. Intermediates needed?

VI. Solve

VII. Does the result make sense?

I. StrategyII. Given and unknown

III. Formula

so

No.

No.

Yes.

Force & Acceleration Example

Ex) A 5.0 kg object is traveling at a constant velocity of 3.2 m/s. What is the net force acting on the object?

IV. Conversions needed?

V. Intermediates needed?

VI. Solve

VII. Does the result make sense?

I. StrategyII. Given and unknown

III. Formula

No.

No.

Yes.

Learning Objectives• Analyze relationships between forces and

motion• Calculate the effects of forces on objects

Newton’s Laws of Motion