1D Motion
What the slope of a position (s) time (t) graph represents.
The name of and value of the force that pulls an object toward the ground when it is launched horizontally.
What is: gravity, -9.8m/s2
The units for coefficient of friction
What is: there are none!
The property that causes an object in motion to remain in motion and an object at rest to remain at rest.
What is: inertia (Newtons 1st Law)
Friction always __________ forward motion
What is opposes?
What the area under a velocity time graph represents.
What is: displacement (s)
The ball of mass that will hit the ground first if a large ball of mass 15.0 kg is dropped at the exact same time that a small ball of mass 0.15 kg is dropped.
What is: they will hit the ground at the same time
The amount a 65 kg person weighs.
What is: 637N
The amount of force the door applies back to Lucas when Lucas pushes against the door with 150N of force.
What is 150N of force? (Newton's 3rd Law)
The weight of a 2,000kg elephant.
What is: 19,600N?
3 ways an object can be considered accelerating.
Speeding up, slowing down, changing direction
This will occur to the range of a projectile launched from ground level as the angle it is launched at is increased.
What is: the range will increase up to 45 degrees, then decrease.
The force necessary to push a shopping cart that has a mass of 65kg in order to accelerate the shopping cart down an aisle at 0.3m/s2
What is: 19.5N
When you push backward on the Earth with one foot while lifting the other, this happens
What is: The Earth applies an equal and opposite force back on you, causing you to move forward?
A man is accelerating upwards in an elevator. He feels ___________ because his normal force is ___________ than the force of gravity.
What is heavier, greater?
How fast a car capable of accelerating at 3.8 m/s² will end up going if it accelerates from rest for 7.2 seconds.
What is: 27 m/s
A 0.15‑kg stone tied to a string swings in a horizontal circle of radius 0.60 m. If its centripetal acceleration is 3.0 m/s2, what is the stone’s speed?
What is: 1.34 m/s
An airplane speeds down a 2 kilometer runway (starting from rest) accelerating at a rate of 3 m/s2. This is the amount of time it takes for the plane to reach the end of the runway.
A hockey puck slides on ice with negligible friction. According to Newton’s first law, what will happen to its velocity if no external horizontal forces act?
What is: the puck continues at constant velocity (constant speed and direction).
The force necessary to for a 4,500kg helicopter to accelerate upwards at 3 m/s2.
What is 57645N?
The initial velocity of a car traveling at 19 m/s decelerating at a rate of -4.5m/s² for 5.2 seconds to slow down before getting to a red light.
What is: 19 m/s
The range of a ball is thrown horizontally off a cliff at 2 m/s from a height of 45 m.
Hint: multi-step
What is: 60.6m
You are pulling your friend on a sled. Your friend and the sled have a combined mass of 140 kg. There is a coefficient of friction between the sled and the snow of .2. This is how hard do you have to pull for your friend and the sled to accelerate at a rate of 1.3 m/s2.
What is: 456.7 N
Elroy Jetson is propelled horizontally by a jetpack. Elroy and the jetpack together have a mass of 45 kg. If air resist exerts 20. N of force against Elroy, this much thrust will provide a 2.5 m/s2 acceleration.
What is: 132.5N
A 7.5 kg basket of laundry is pushed with a force of 85N over a carpeted surface with a coefficient of friction of 0.35.The acceleration of the basket is __________
HINT: NET FORCE
What is: 7.90 m/s2