Which requires more work- lifting a 50-kg sack a vertical distance of 2 m or lifting a 25-kg sack a vertical distance or 4 m?
Both are the same amount of work
because the force x distance is the same for each.
Which requires more work lifting a 50 kg sack a vertical distance of 2 m or lifting a 25 kg sack a vertical distance of 4m?
Which requires more work- lifting a 50-kg sack a vertical distance of 2 m or lifting a 25-kg sack a vertical distance or 4 m?
Both are the same amount of work
because the force x distance is the same for each.
What task requires the most work lifting 50 kg sack 2 meters or pushing a 50 kg sack 2 meters?
| Term if you push for a half hour or a whole hour against a stationary wall.. Definition no work on the wall is done in either case. | Term what task requires the most work, lifting a 50 kg sack 2 meters or lifting a 24 kg 4 meters? Definition both require the sam amount of work . |
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When an object is raised twice as high what happens to its gravitational potential energy?
Since the gravitational potential energy of an object is directly proportional to its height above the zero position, a
doubling of the height
will result in a doubling of the gravitational potential energy. A tripling of the height will result in a tripling of the gravitational potential energy.
What is the gain of potential energy of the barbell when it is lifted to this height quizlet?
1200 J. What is the gain of potential energy of the barbell when it is lifted to this height?
430 W.
310 J.
Which force does work when a ball rolls down a slope?
The
force of gravity
points straight down, but a ball rolling down a ramp doesn’t go straight down, it follows the ramp. Therefore, only the component of the gravitational force which points along the direction of the ball’s motion can accelerate the ball.
How much work is done on a 200 kg crate that is hoisted 2m in a time of 4s?
| Question Answer | how much work is done on a 100 kg crate that is hoisted 2m in a time of 4s 100 x 10N = 1000 x 2m = 2000j | How much power is required to raise a 200-kg crate a vertical distance of 2 m in a time of 4 s? 200 x 10 = 2000 x 2m = 4000/4 = 1000 Watts |
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What requires more work lifting 50 kg?
Which requires more work: lifting a 50kg sack a vertical distance of 2m orlifting a 25kg sack a vertical distance of 4m? Answer= It is the same, for the product of each is the same; (50 kg) (2 m) = (25 kg) (
4 m
).
What is the relationship between work and power?
Work is referred to as the process of energy that is transferred to an object’s motion by applying force. It is generally represented as the product of displacement and force. Power is the amount of energy that is transferred in a unit of time. The formula for calculating the force is
Work = Force * Displacement.
What is the common formula for work?
Work can be calculated with the equation:
Work = Force × Distance
. The SI unit for work is the joule (J), or Newton • meter (N • m). One joule equals the amount of work that is done when 1 N of force moves an object over a distance of 1 m.
What are the factors that affect potential energy?
Gravitational Potential Energy is determined by three factors:
mass, gravity, and height
. All three factors are directly proportional to energy.
How do you calculate GPE?
Gravitational potential energy changes into kinetic energy. The equation for gravitational potential energy is
GPE = mgh
, where m is the mass in kilograms, g is the acceleration due to gravity (9.8 on Earth), and h is the height above the ground in meters.
What energy depends on mass and speed?
The energy transferred is known as
kinetic energy
, and it depends on the mass and speed achieved. Kinetic energy can be transferred between objects and transformed into other kinds of energy.
Which if either has greater momentum a 1 kg ball moving at 2 m/s or a 2 kg ball moving at 1 m s?
Which if either has a greater momentum: a 1-kg moving at 2m/s or a 2-kg bad moving at 1 m/s. Which has a greater kinetic energy? Same momentum, but different KE. The 1-kg ball traveling at 2 m/s
has a greater KE
.
Is it possible to design a machine that has an efficiency greater than 100 %?
Explanation: No machine is free from the effects of gravity, and even with wonderful lubrication, friction always exists. The energy a machine produces is always less than the energy put into it (energy input). … That is why
100% efficiency in machines shall not be possible
.
Why do you do no work on a 25 kg backpack?
Why do you do no work on a 25 kg backpack when you walk a horizontal distance of 100 m? You do no work
because the backpack moves relative to you
. … When a rifle with a longer barrel is fired, the force of expanding gases acts on the bullet for a longer distance.
