horizontal projectiles
projectiles w/ angles
circular motion
relative velocity
Hodge-Podge
100
An object with independent horizontal and vertical motion.
What is a projectile
100
A projectile launched with an angle will have a longer... than one launched horizontally.
What is hang time? or What is range?
100
Constant speed and a fixed radius.
What are the two conditions necessary for an object to be in uniform circular motion?
100
The sum of all velocitys acting on an object.
What is relative velocity.
100
This is the horizontal acceleration of a projectile after it is fired.
What is zero?
200
The path of a projectile
What is trajectory?
200
45 degrees
What is the angle that will give the longest range?
200
An object in uniform circular motion does NOT have constant velocity because...
What is the direction is changing?
200
A person is walking forward on a moving sidewalk at 3.0 m/s. If the sidewalk is moving at 5.0 m/s, what is the velocity of the person relative to the ground (speed and direction)?
What is 8.0 m/s forward?
200
When a problem has multiple frames of reference, this is used to determine relative velocity.
What is vector addition?
300
How far the object travels horizontally.
What is range?
300
The horizontal velocity does not affect the ______________ of a projectile.
What is vertical velocity?
300
The direction of centripetal force is always...
What is toward the center of the circle?
300
An airplane is flying at 15 km/s north. A wind is blowing at 7.0 km/s east. What is the velocity of the plane relative to the ground (speed and direction)?
What is 17 m/s NE.
300
Daily Double: A punter kicks a football at an angle of 45 degrees to the ground. The football has an initial velocity of 25 m/s. Find the time, range, and maximum height of the football.
0.71 s, 27m, 15m
400
How long the object spends in the air.
What is hang time?
400
The acceleration due to gravity does not affect the _____________.
What is horizontal velocity?
400
Newton's first law says that when the centripetal force is removed from an object in uniform circular motion, the object will...
What is continue in a straight line, tangent to the circle?
400
DAILY DOUBLE: A boat moves north at 2.7 m/s across a river that flows west at a rate of 1.2 m/s. This is the boat's velocity relative to the riverbank.
What is 3.0 m/s?
400
Daily Double: A car moving at 8.33 m/s rounds a bend in the road and has a radius of 21.2 m. This will be the centripetal acceleration of the car.
3.28 m/s^2
500
Acceleration due to gravity.
What is the only acceleration experienced by a projectile after it is in the air?
500
A projectile is launched with an angle of 32 degrees and a horizontal velocity of 15 m/s. 10 seconds later the horizontal velocity is ____________.
What is 15 m/s?
500
DAILY DOUBLE: Draw a diagram representing the velocity, acceleration and force vectors of circular motion.
500
A person is walking up on a down escalator. If the person is traveling at 5 m/s up and the escalator is moving at 5 m/s down, what is the motion of the person relative to the floor (speed and direction)?
What is stationary - no velocity or direction.?
500
F=ma
What is Newton's 2nd Law?