speed in a given direction
Velocity
change in velocity over time
acceleration
mass x velocity
momentum formula
what is the speed of an object that is moved 10m in 5 seconds?
2m/s
distance and direction of an objects change in position from the starting point
distance
Which of the following is a measure of velocity?
A. 30
B. 30 South
C. 30 m/s
D. 30 m/s, South
C. 30 m/s south
acceleration formula
Final Velocity – Initial Velocity/ Time
the product of an object's mass and velocity
momentum
total distance divided by total time
Average Speed
Distance with direction between start and finish.
displacement
A 1,400-kilogram car is also traveling in a straight line. Its momentum is equal to that of the truck in the previous question. What is the velocity of the car?
v = 28.6 m/s
A ball is dropped from the top of a building. After 2 seconds, it’s velocity is measured to be 19.6 m/s. whats the ball acceleration.
9.8 m/s²
A 1-kilogram turtle crawls in a straight line at a speed of 0.01 m/sec. What is the turtle’s momentum?
p= 0.01 kg m/s
Speed is the ratio of the distance an object moves to
the amount of time needed to travel the distance.
Suppose it takes a plane 5 hours to travel from Philadelphia to San Francisco. It travels at an average speed of 500 miles per hour. What is the distance between the two cities?
2500 miles
If a ferrari, with an initial velocity of 10 m/s, accelerates at a rate of 50 m/s2 for 3 seconds, what will its final velocity be?
160m/s
In which of the following conditions does the car not accelerate?
a. A car moves at 80 km/h on a flat, straight highway
b. the car turns a corner
c. the car slows down from 80 km/h to 35 km/h
d. the car speeds up from 35 km/h to 80 km/h
a. A car moves at 80 km/h on a flat, straight highway
an object with a mass of 146 kg is moving to the right with a velocity of 17 m/s. Calculate the momentum of the object.
2482 kg m/s
What does this graph represent?
constant speed
What does the strength of gravity between two objects depend upon?
mass and distance
A person walks 1 mile every day for exercise, leaving her front porch at 9:00 A.M. and returning to her front porch at 9:25 A.M. What is the total displacement of her daily walk?
0
What is the acceleration of a car that travels in a straight line at a constant speed?
0
What is conserved when two objects collide in a closed system?
momentum
A distance-time graph indicates that an object moves 100 m in 4 s and then remains at rest for 1 s. What is the average speed of the object?
20m/s
Which distance can be most accurately measured with a ruler?
a. the length of a river
b. the width of a book
c. the distance between two cities
d. the size of an object under a microscope
b. the width of a book