Second Law Calculation Lesson

Forces LT5 - Newton's 2nd Law Calculations

Physical Science 9A

Multiple Choice

Daily Review #1:

Which object has greater inertia?

Open Ended

If a person hits a softball and a bowling ball with the same force, will they both accelerate at the same rate? Why or why not? Explain your answer.

Open Ended

What net force is needed for a 1600 kg automobile to accelerate at a rate of 2.0 m/s2?

$$F=ma$$  

Open Ended

A baseball accelerates downward at 9.8 m/s2. With negligible air resistance and a net force of 1.4 N, what is the baseball’s mass?

$$F=ma$$  

Open Ended

What is the acceleration of a 58-kg boy on a skateboard if he is pushed forward with a force of 15 N and the opposing force of friction is 4 N?

$$F=ma$$  

Open Ended

What force does a car’s engine exert in a car that has a mass of 3,000 kg and is accelerating at 2 m/s2 ?

$$F=ma$$  

Open Ended

A rubber ball is dropped from a tall building. Ignoring air resistance, what force does gravity apply to it if has a mass of 0.25 kg? 
(Hint: the object is accelerating towards Earth!)

$$F=ma$$  

Poll

Can you calculate force, mass, and acceleration of an object using Newton's 2nd Law of Motion?

• Yes, it's easy for me.

• I kind of understand how to but could use some more practice :)

• No, I don't get it at all!