Explain the difference between a vector and scalar quantity.
Scalars have magnitude. Vectors have magnitude and direction.
100
A space rock is dropped from rest, and falls 10 meters in 2.5 seconds. What is the acceleration due to gravity on the this planet?
What is 3.2 m/s^2
100
A rubber popper is shot upward and travels 4 meters into the air. What's the initial velocity of the popper?
8.86 m/s
200
Define the following terms:
Average Speed, Average Velocity, Acceleration
Average Speed - change in distance over time
Average Velocity - change in displacement over time
Acceleration - Change in velocity over time
200
An object moves a total of 15 meters in 5 seconds and winds up back in it's starting position. Determine the average speed and average velocity of the object throughout its trip.
Average velocity = 0 m/s
Average speed = 3 m/s
200
A lacrosse ball is thrown at an angle of 30 degrees to the horizontal. The magnitude of the vertical component (viy) of it's initial velocity is 15 m/s. How much time does the ball spend in the air?
3.06 seconds
300
Find the magnitude of the northward and westward components of a 5 unit vector at 50 degrees north of west.
West = 3.2 units
North = 3.8 units
300
Starting from rest, an object rolls down a 20 meter incline in 3 seconds. What is the acceleration of the object?
4.4 m/s^2
300
A baby kangaroo jumps horizontally from a 50 meter tall cliff with an initial velocity of 10 m/s. How much time does it take the kangaroo to safely hit the ground? How far from the base of the cliff does the kangaroo land?
Time = 3.19 seconds;
Distance = 31.9 meters
400
A plane flying due west at 500 m/s is hit by wind heading due north at 50 m/s. Determine the magnitude of the resultant velocity of the plane.
502.5 m/s
400
An object initially traveling at 10 meters per second West accelerates uniformly at 3 m/s^2 East for 3 seconds. What is the magnitude and direction of the final velocity of the object?
1 m/s West
400
A basketball outlet pass is thrown at an angle of 60 degrees above the horizontal. The initial velocity of the basketball is 20 meters per second. Determine the vertical component of the basketball's initial velocity. Determine the time it takes the basketball to reach the peak of it's flight.
Initial Vertical Velocity = 17.3 m/s;
Time to peak = 1.88 s