Practice for final exam. Ch4, Lesson1: Forces and motion

According to __________, the acceleration of an object is equal to the net force acting on the object divided by the object's mass. 

• Newton's Second Law
• Newton's Third Law
• Newton's First Law

How much force is needed to accelerate a 3kg skateboard at 5m/s²?

• 8N
• 1.6N
• 0.6N
• 15N

What Unit do we Measure Force in?

• Newtons

• Joules

• Force

• Kilograms

If a 10 kilogram object accelerates suddenly at 15 m/s^2, how much force was applied to the object?

• 150 Newtons
• 15 Newtons
• 150 kilograms
• 100 kilograms

A car is 2000kg and accelerating at 20m/s², what is the net force applied to it?

• 40000 N
• 100 N
• 5 N
• 200 N

A force of 90N is applied to each cart below, which one will accelerate the fastest?

• Cart 1
• Cart 2
• Cart 3 
• Cart 4

• Force is directly proportional to acceleration

• Force is inversely proportional to acceleration

• Mass is directly proportional to acceleration

• Mass is inversely proportional to acceleration

A ball has an acceleration of 8 m/s². If the force is tripled, the ball's new acceleration will be:

• 24 m/s²

• 11 m/s²

• unchanged

• 2.67 m/s²

An object A is moving with an acceleration of 6 m/s². If the same force is affected on an object B with a mass equal one-third of the first object, what is the acceleration of object B will be :

• 3 m/s²

• 2 m/s²

• 18 m/s²

• 9 m/s²

Which of the following is classified as field forces?

• The force exerted on the earth by the moon

• the force exerted from the player to throw a ball

• the force a chilled exerts to pull a table

• the force of air resistance on a falling object