Newton’s 2nd Law of Motion Flashcards
A matchbox car weighing 100g is traveling at .5 m/s². How much force was needed to cause this acceleration?
(Dont forget: 1kg=1000g or 1g=.001kg)
a. .05N
A boulder is accelerated to 4 m/s² with 10,000N worth of force. How much did the boulder weigh?
2,500kg
How fast will a 80kg object accelerate if 3,000N of force are applied to it?
37.5m/s²
If my truck pushes on the back of a 1,500kg non-running vehicle with 2,500N of force, how fast would the car accelerate?
1.6m/s2
How fast does a 6kg ball accelerate if pushed by a 66N force?
11m/s2
A 400lb wrestler wants to accelerate a 100kg weight at 5m/s2. How much force will he need to push the weight
500N
Can I move an object with a mass of 100kg and accelerate it to 2m/s2 if I push on it with 200N worth of force?
Yes, that is exactly enough force to accelerate that object to 2m/s2.
If you are driving in your car and slam on your brakes are you accelerating?
Yes, any change in velocity is a change in acceleration.
What is the acceleration of a free falling object on EARTH due to gravity?
9.8m/s^2
How much force would be needed to accelerate a 1,500kg car 3m/s²?
4,500N
When looking at Newton’s 2nd Law of Motion, what must we as scientists ignore when using the f = ma formula?
You must ignore friction and air resistance that slows everything down on Earth.
1. A 2,000kg race car to move with 22,400N worth of force applied by its engine.
Which scenario has the faster acceleration?
The motorcycle has more than twice the acceleration of the race car.
The motorcycle has more than twice the acceleration of the race car.
How much force would be needed to pull my 25kg little brother in a sled at 2.5m/s2?
62.5N
How much force would be needed to get a .5kg baseball to accelerate at 10m/s2? (Prove on paper!)
5N
Which of the following statements is FALSE of Newton’s 2nd law?
Two cars with different masses are pushed with the same force. The more massive car would accelerate faster.
