Newton's Laws
How many of Newton's Laws are there?
3
What are the units for acceleration?
m/s2
What is the unit for force?
Newton (N)
A hunter shoots a 2 kg arrow accelerating it at 15 m/s2. How much force does this require?
30 N
In Cart Lab 3 (2 weeks ago), what variable did we change each round?
The mass
What is the equation for Newton's second Law?
F=ma
What is the constant acceleration of gravity?
9.8 m/s2
What does 1 Newton equal?
1 kg * m/s2
A man pushes a 300 kg car with 600 N of force. How much is the car accelerated?
200 m/s2
What happened to the acceleration in Cart Lab 3 when the mass was increased?
Acceleration decreased
What is Newton's 1st Law?
An object at rest will remain at rest or in uniform motion unless acted on by an external force?
A train moves from rest to a speed of 25 m/s in 30 seconds. What is its acceleration?
0.83 m/s2
How much force is required to accelerate a 2 kg mass at 3 m/s2?
6 N
A batter hits a baseball with 500 N and the ball is accelerated at 25 m/s2. What is the mass of the ball?
20 kg
What is the equation we used to find the weight of an object in lab last Thursday?
Third Law
If a train going 60 m/s hits the brakes, and it takes the train 1 minute and 5 seconds to stop, what is the train's acceleration?
0.92 m/s2
If I increase the mass of an object, but the acceleration stays constant, what happens to the force?
It will increase
A 5 kg book rests on a table. How much force is exerted on the table?
49 N
Which of Newton's Laws did Cart Lab 4 focus on?
Newton's Second Law