A car travels 90 meters due north in 15 seconds. Then the car turns around and travels 40 meters due south. What is the magnitude and direction of the car's resultant displacement?
What is 50 meters north.
100
What is required to cause an acceleration?
What is force
100
speed is a _____quantity.
What is scalar
100
How much force is needed to accelerate a 25 kg bowling ball at 2m/s.
What is 50 N
100
changes in speed, direction or both are called?
What is acceleration
200
Which best describes a vector?
What is it has both direction and magnitude.
200
A 2250 kg pickup truck has the velocity of 25 m/s to the east. What is the momentum of the truck?
What is 56250 kg-m/s; east
200
Which of the following has the most inertia:
A parked train
a moving car
a bike on the sidewalk
a penny on the roof
What is a parked train
200
If a 2kg bird is pushed by the wind with a force 2N, how fast does the bird accelerate.
What is 1 m/s
200
What type of force will cause a change in an object's motion?
What is unbalanced force
300
Is this a scalar or vector quantity? A deer running 15 meters per second due west.
What is vector
300
The equation for work.
What is force x distance
300
The force of gravity pulling down on an object is called?
What is weight
300
What is the density of a rock that has a mass of 4 grams and a volume of 1.2cm^3.
What is 3.33
300
What kind of energy is in a moving skateboard?
What is kinetic energy
400
If a boomerang is thrown 20 m in a straight line and returns exactly to the spot it was thrown what is its displacement?
What is 0 meters.
400
An object that has a constant velocity is or is not accelerating?
What is not accelerating
400
Which of newton's laws shows the relationship between force, mass and acceleration
What is newton's second law of motion
400
You and your dad are moving the couch from one side to another. Your dad pushes with a force of 35N to the right and you push with a force of 25 N right. What is the net force on the couch?
What is 60 N right
400
A heavy football player and a light one run into each other, who exerts more force?
What is they are equal
500
If a car moves 12 km north, 19 km east and 12 km south, what is its displacement?
What is 19 km, east.
500
Each of the following are examples of newton's laws except?
Law of inertia
conservation of energy
F=ma
action/reaction pairs
What is conservation of energy
500
A push or pull exerted on an object
What is force
500
If you exert a force of 20 N to push a desk 10M, how much work did you do on the desk?
What is 200 J
500
A child walks 5 meters north, then 4 meters east, and finally 2 meters south. What is the magnitude of the resultant displacement of the child after the entire walk?