Show:
Motion Vocab.
Units..oh, unit!
Speed and Velocity
Acceleration & Momentum
Forces, Friction & Newton's Laws
100
The distance an object travels in one unit of time.
What is speed?
100
m/sec OR meters/sec are units for: A. velocity B. speed C. momentum D. acceleration
What are the units for speed (A)?
100
Max runs 24 km in four hours. Calculate his speed and show all of your work!
s=d/t s= 24 km/4hr s =6 km/hr
100
Another name for "mass in motion"; the product of an object's mass and velocity.
What is momentum?
100
The type of force that creates motion.
What is an unbalanced force?
200
A change in position relative to a reference point - when one object's distance from another is changing.
What is MOTION?
200
km/sec West - are the the units for: A. speed B. acceleration C. velocity D. momentum
What are the units for velocity (C)?
200
Tina rides her bike 50 miles in a northern direction in 3 hours. What is her velocity? (Round to the nearest tenth)
v =d/t including direction v = 50 miles/3 hours North v = 16.7 mi/hr North
200
A ride at Six Flags falls straight down for 3 seconds. During that time, the ride accelerates from a speed of 0 m/sec to a speed of 45 m/sec. What is the acceleration of the ride?
a = final velocity - initial velocity / time a = 45 m/sec - 0 m/sec / 3 sec a = 15 m/sec/sec
200
The word used to express the idea that objects at rest stay at rest, and objects in motion stay in motion.
What is inertia?
300
A place or object used for comparison to determine if an object is moving.
What is REFERENCE POINT?
300
mi/hr/sec - miles per hour per sec are unit for: A. speed B. velocity C. momentum D. acceleration
What are the units for acceleration (D)?
300
What is the difference between speed and velocity?
Velocity is speed plus the direction something is traveling.
300
Jacks rolls a 5 kg bowling ball down the lane 6 m/sec. What is the momentum of the bowling ball?
p = m x v p = 5 kg x 6m/sec p = 30 kg/m/sec
300
Just like air coming out of a balloon pushes it forward, the hot gases push a rocket up towards space is a perfect example of which of Newton's Laws of Motion?
What is Newton's third law -for every action, there is an equal and opposite reaction?
400
Speed in a given direction
What is VELOCITY?
400
kg/m/sec East - are the units for: A. momentum B. speed C. acceleration D. velocity
What are the units for momentum (A)?
400
A weather forecaster tells us that a storm is moving at a speed of 15km/hr. What distance will the storm travel in 4 hours?
s = d/t 15 km/hr = d/4 hr d = 15 km/hr x 4 hr d = 60 km
400
A skier begins skiing down the mountain at 4 km/hr and increases his speed to 22km/hr in 3 seconds. What is his rate of acceleration?
a = final velocity - initial velocity / time a = 22km/hr - 4 km/hr / 3 sec a = 18 km/hr / 3 sec a = 6 km/hr/sec
400
Rougher surfaces increase this type of force.
What is friction?
500
The rate at which velocity changes.
What is ACCELERATION?
500
m/sec/sec west (meters per second squared) are units for: A. velocity B. acceleration C. speed D. momentum
What are units for acceleration (B)?
500
Ana walked 15 meters in 5 seconds. Harry walked 12 meters in 4 seconds. Who had a greater speed?
Neither - they both have a speed of 3 m/sec.
500
List three ways acceleration can be changed.
What is increasing speed, decreasing speed, and changing direction?
500
Juggling a three bowling balls is more difficult than juggling three tennis balls. How does this example demonstrate Newton's 2nd Law? Be sure to include the definition of Newton's 2nd Law in your answer.
Newton's 2nd law states that the larger the mass of something, the more force is needed to acceleration. Since bowling balls have more mass, more effort or force is needed to juggle them than bowling balls?