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Gravity
Centripetal Acceleration/Force
Torque
Rotation/Revolution
EXTRA
100
Object attract other objects with force proportional to product of mass and is inversely proportional to the square of the distance between them.
Newton’s law of Universal Gravitation
100
What is Centripetal Force?
The net force exerted toward the center of the circle that causes an object to move in a circular path
100
Is Torque a vector quantity of scalar quantity?
Vector quantity
100
What is rotation?
motion of a body in which the body turns around its own axis without a change in position
100
What unit is torque measured in?
Newton-meters(Nm)
200
Write the equation for law of universal gravitation
F= G((m1)(m2)/(R^2))
200
What is the equation for centripetal acceleration?
(v^2/r)
200
Negative torque rotates a stationary object in a __________ direction.
clockwise
200
What is an example of a rotation?
Earth rotates every 24 hours
200
Is torque a force?
no
300
Gravitational Constant is...?
6.67×10−11 N·(m/kg)^2
300
What is the equation for centripetal force?
m(v^2/r)
300
To keep a seesaw balanced with someone half your weight you should sit ________ to the fulcrum.
closer
300
What is a revolution?
the movement of a body along a circular path with a continuous change in its position
300
Is centrifugal effect a force
no.
400
Two bowling balls of mass 7.26 kg, and from their center is separated by 0.30 m. What is their attractive gravitational force?
Fg=3.9 x 10^-8
400
A 900-kg car moving at 10 m/s takes a turn around a circle with a radius of 25.0 m. Determine the acceleration and the net force acting upon the car.
a)4m/s^2 b)3600N
400
A 0.6 N force is applied to the handle of a wrench to rotate a screw. If the lever arm is 0.4 m long, find the torque applied to the screw.
0.24 Nm
400
What is an example of a revolution?
Earth makes one revolution around the sun every year
400
True or False: Linear speed and tangential speed are the same
true.
500
What is the equation of acceleration of objects due to Earth's gravity? Explain the relationship
a=G(re/r)^2 As the object moves farther away from the earth's center the acceleration due to gravity is reduced according to the inverse square relationship.
500
Determine the centripetal force acting upon a 40-kg child who makes 10 revolutions around the Cliffhanger in 29.3 seconds. The radius of the barrel is 2.90 meters.
speed=(2 • pi • R) / T = 6.22 m/s. Then find the acceleration using a = v2 / R = = (6.22 m/s)2 / (2.90 m) = 13.3 m/s/s Now use Fnet = m • a to find that Fnet = 533 N.
500
True or False: The direction of the force you applied is important.
true
500
What is Centrifugal Effect?
An object traveling in a circle behaves as if it is experiencing an outward force.
500
What similarity did Newton notice with the apple and the moon?
Both the apple and the moon are attracted to the Earth. Gravity causes this attraction.