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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How much gravitational potential energy is added when a 3.0 kg book is lifted 2.0 m?
Terms in this set (6) Show that 50 W of power is required to give a brick 100 J of PE in a time of 2 s. Show that when a 3.0 kg book is lifted 2.0 m its increase in gravitational potential energy is
60 J
.
Which requires the most amount of work by the brakes of a 1000kg car?
How far will it skid with locked brakes when traveling at 150 km/h? Which requires the most amount of work by the brakes of a car?
twice as far
.
Which requires more work stretching a strong spring?
Which requires more work: stretching a strong spring a certain distance or stretching a weak spring the same distance? Defend your answer.
More force
is required to stretch the strong spring, so more work is done in stretching it the same distance as a weaker spring.
What task requires the most work lifting a 50 kg sack 2 meters or lifting a 25 kg sack 4 meters?
What task requires the most work lifting a 50 kg sack 2 meters or lifting a 25 kg sack 4 meters? 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).
Which requires more work lifting a 50 kg sack vertically 2 meters or lifting a 25 kg sack vertically 4 meters?
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.
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.
How much does the gravitational potential energy of a 1.2 kg textbook increase if you lift it upward 32 cm?
How much does the gravitational potential energy of a 1.2 kg textbook increase if you lift it upward 32 cm? PE = mgh 32 cm =0.32 m,
g = 9.8 m/s2 27
.
How much gravitational potential energy does a 1000 kg boulder raised 5 m above ground have?
Show that the gravitational potential energy of 1000 kg boulder raised 5 m above ground level is
50,000 J
. You can express g in units of N/kg because m/s^2 is equivalent to N/kg.
How high would you have to lift a 1000 kg car to give it a potential energy of?
7. How high would you have to lift a 1000. kg car to give it a potential energy of:
2.0 x 103 J 8
.
How much power is expended if you lift?
If it takes 1 second to lift the weight 1 meter, than you have converted
10 Joules
of energy to potential energy in one second. That’s 10 Watts of power. If you lift a 2 kg weight 1 meter in 1 second, then the rate of energy conversion is 2 x 10 = 20 Joules per second, or 20 Watts of power.
How do you calculate work done?
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.
Why do you do no work on a 25 kg backpack when you walk a horizontal distance of 100m?
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
. … Although no work is done on the wall, work is nevertheless done on internal parts of your body. Two people who weigh the same climb a flight of stairs.
Why is it easier to stop a lightly loaded truck than a heavier loaded truck that has equal speed?
It is easier to stop a lightly loaded truck as
its Kinetic Energy is less that the heavily loaded truck
. Kinetic energy is directly proportional to mass of a body moving at constant speed, so higher the mass more is the Kinetic energy, and hence more difficult to stop the truck.
At what point in its motion is the KE of a pendulum?
Once the weighted end of the pendulum is released, it will become active as gravity pulls it downward. Potential energy is converted to kinetic energy, which is the energy exerted by a moving object. An active pendulum has the most kinetic energy at
the lowest point of its swing when the weight is moving fastest
.
