Newton's 2nd Law

​Newton's 2nd Law

May the Force be with you​

Multiple Choice

What is force?

• it's a Star Trek thing

• push or pull

• movement to the right or left

• acceleration due to gravity

Multiple Choice

What would be the units for Force?

• Kilograms (Kg)

• Minutes (min)

• Meters per Second Squared (m/s²)

• Newtons (N)

Multiple Choice

What could be a unit for acceleration?

• Kilograms (Kg)

• Minutes (min)

• Meters per Second Squared (m/s²)

• Newtons (N)

Multiple Choice

What could be a unit for mass?

• Kilograms (Kg)

• Minutes (min)

• Meters per Second Squared (m/s²)

• Newtons (N)

​Newton's Second Law

States that the acceleration of an object is proportional to the net force acting on the object and inversely proportional to the mass of the object.

Why does this matter?​

​Relationships

​The slope of a Force-Acceleration graph is the mass of an object.

​

​The slope of an acceleration-mass graph is the net-force

Subject | Subject

Some text here about the topic of discussion

​To solve a Newtons 2nd law problem:

• ​Draw a free-body diagram showing the direction and relative strength of each force acting on the system

• Add the foce vectors to find the net force​

• Use Newton's second law to calculate the acceleration

• Use what you know about accelerated motion to find the velocity or position​ of the object(s)

Multiple Choice

Find the acceleration of an object with 1 kg and 1 N.

• 10 N

• 1 N

• 1 m/s²

• 10 m/s2

Multiple Choice

A force of 20 N acts upon a 5 kg block. Calculate the acceleration of the object.

• 4 m/s²

• 0.25 m/s²

• 100 m/s²

• 2 m/s²

Multiple Choice

Find the force of an object with 8 kg and 3 m/s².

• 12 N

• 0.38 N

• 2.7 N

• 24 N

Multiple Choice

Find the mass of an object with 10 N and 1 m/s2 .

• 10 Kg

• 5 Kg

• 0.1 Kg

• 20 Kg

Multiple Choice

Aliya kicks a soccer ball with a mass of 0.5 kg. It accelerates with a rate of 5 m/s². What would be the force she used to kick it?

• 0.1 N

• 10 N

• 2.5 N

• 15 N

Multiple Choice

Sydney kicks a bowling ball with a mass of 5 kg. It accelerates at 2 m/s². What was the force he used to kick the ball?

• 20 N

• 2.5 N

• 0.4 N

• 10 N

Multiple Choice

Miguel uses 3000 Newtons to push Ted in a wheelchair. Ted accelerates at 50 m/s² before slowing down to turn a corner. What is the mass of Ted and the wheelchair?

• 6 g

• 150,000 Kg

• 60 Kg

• 0.017 Kg

Multiple Choice

What is the acceleration of a 50 kg object pushed with a force of 500 Newtons?

• 1 m/s²

• 10 m/s²

• 0.1 m/s²

• 25,000 m/s²

Multiple Choice

Find the acceleration of an object with 4 N and 0.2 kg.

• 0.8 m/s²

• 40 m/s²

• 0.05 m/s²

• 20 m/s²

Multiple Choice

The mass of a young elephant is 100 kg. How much force would be required to accelerate the elephant at a rate of 3 m/s²?

• 300 N

• 33.3 N

• 0.03 N

• 10 N

Multiple Choice

An object of mass 300 kg is observed to accelerate at the rate of 4 m/s². Calculate the force required to produce this acceleration.

• 12 N

• 1200 N

• 75 N

• 0.013 N

Multiple Choice

Find the mass of an object with 17 N and an acceleration of 1.7 m/s².

• 1 Kg

• 0.1 Kg

• 28.9 Kg

• 10 Kg

Multiple Choice

Zack is skiing. He is not a good skier. If he has a mass of 103 kg, and an acceleration of 14m/s², what is the Force Zack feels when he skis into a tree?

• 1442 N

• 2401 N

• 0.14 N

• 7.4 N