Show:
Linear Motion
Mechanical Equilibrium
Linear Motion
Mechanical Equlilibrium
100
An airplane accelerates down a runway at 3 m/s2 for 3 s until is finally lifts off the ground. Determine the distance traveled before takeoff.
Answer: d = 9 meters
100
What is happening when an object is in motion
Its not moving in any linear motion, its not rotating either
100
What is the speed of an object that travels 100 miles in two hours?
S= 50 mph
100
Flip, an exhausted gymnast, hangs from a bar by both arms in an effort to catch his breath. If Flip weighs 650 N, what is the tension in each of Flip’s arms as he hangs in place?
a tension of 325 N. *Explanation --> Since Flip is pulling down on the bar with a force of 650 N, his arms must be holding him up by sharing an upward force of 650 N. If each of Flip’s arms shares the force equally, it equals 325 N.
200
A car starts from rest and accelerates uniformly over a time of 5 seconds for a distance of 110 m. Determine the acceleration of the car.
Answer: a = 22 m/s/s
200
Two figures who bare a striking resemblance to Mr. Worm and Mr. Hall are having a tug of war, the so-called Mr. Hall is pulling on the rope with 90 vectors of force, while the so-called Mr. Worm is pulling the rope at 150 vector of force. Who will win.
The So-Called Mr. Worm would win because he is pulling with 60 more vectors...
200
What is the acceleration that goes from 0 to 90 mph in 10 seconds?
A= 9 mph/s
200
If an object is sliding on ice, it will continue sliding until a force slows it down True or False.
True
300
Upton Chuck is riding the Giant Drop at Great America. If Upton free falls for 2 seconds, what will be his final velocity and how far will he fall?
Answers: fv = 2 m/s
300
A ___ can be defined as a push or pull.
A force
300
A race car goes by at a constant speed of 200 mph, What is it's acceleration?
No acceleration is happening.
300
Describe the forces that act on a rock at rest in your hand.
Your hand pushes upward on the rock with as much as Earth's gravity pulls down on it.
400
A race car accelerates uniformly from 18 m/s to 46 m/s in 2 seconds. Determine the acceleration of the car and the distance traveled.
Answers: a = 28 m/s
400
The combination of a the forces acting on object is called the ______ ____
Net force
400
A jet travels at 600 km/h for two hours, How far does it go?
D= 1,200 km
400
Define resultant :] (Hint: it was on the notes)
The sum of two or more vectors.
500
A feather is dropped on the moon from a height of 1 meter. The acceleration of gravity on the moon is 1 m/s2. Determine the time for the feather to fall to the surface of the moon.
Answer: t = 1 s
500
____ is the force that opposes the motion of an object
Friction
500
How long does it take a car at an acceleration of 14 km/h/s to reach 54 km/hr?
4 seconds
500
While moving out of the house, Jack carries a 120-N box to his car, holding it with both arms, 1) How much force must be exerted by each of his arms to support the box? 2) How will this force change if Jack holds the box with only one arm?
1) Each arm holds half the weight of 60 N 2) The force would be a full 120-N