20cm 2. A solid and uniform 0.8 kg disk with a radius of 20 cm starts at rest above. A 10 N force is applied tangentially to the disk. An ant clings to the edge of the disk. Ants are famous for their "arm" strength. I read they can apply a force 5,000 times greater than their weight. Use this fact to approximate the time at which the ant will no longer be able to cling to the disk.

Q: What is the work done by the force pulling a block 1 meter with two 0.5 kg masses on it?

A: We know, Workdone=Force ×displacement

Q: What net force, in Newtons, is needed to do 1,847 J of work over a distance of 144 meters?   Round…

A: Given thatwork, W=1847 Jdistance, d=144 mas work, W=Fdwhere F is force

Q: How much work is done in carrying a 2 kg book 2 m above the ground

A:

Q: person lifted a bag of groceries 2.89 m from the floor onto a counter top using a constant force of…

A:

Q: Calculate the work done when a force of 5 N moves a book 1.2 m. (Remember that 1 N?m 5 1 J.)

A:

Q: A power mower does 8 x 104 J of work in 0.4 h. What power does it use?

A: Work done, W = 8 x 104 J = 80000 J Time taken, t = 0.4 h = 0.4 x 3600 s = 1440 s   Power of the…

Q: Question What will be the potential energy of a body of mass 5 kg kept at a height of 10 m ?

A: Given data, Mass of the body, m = 5 kg. Height h = 10 m. Acceleration due to gravity g=9.8 m/s2

Q: A spring that stretches 10 cm under a load of 200 g requires how much work to stretch it 5 cm from…

A: Given data F=200 gX1=0.1 m

Q: A man exerts a force of 1kN on a boulder but fails to move it. Calculate the work done.

A: Work is done on an object when a force causes displacement of the object. In other words, Work…

Q: if you do 20 J of work lifting a rock weighing 30 N, how far will you lift it?

A: Write the given values with the suitable variables. W=20 JP=30 N Here, W is the required work and P…

Q: power is developed? 7750 W 12.4 W 17.6 W 122 W llit a crate is 310 J. If the crate is lifted in 25s,…

A: Work required (W) = 310 J Time (t) = 25 s

Q: Suppose you lift a laptop that weighs 4.4 pounds off the floor onto a shelf that is 3 feet high. How…

A: Given data The mass of the laptop is given as m = 4.4 lb. The height of the lift is given as h = 3…

Q: A crate of mass 50kg is pushed along a floor with a force of 20N for a distance of 5m. Calculate the…

A: Given data :                       Force  =  F                      Distance  =  d        To find :…

Q: Suppose you are using a see-saw with your friend. You have a weight of 500 N and your friend has a…

A: Given data: The weight of man is W=500 N. The weight of friend is W'=600 N. The distance of man from…

Q: How high can a 360 kg object be lifted using 15,100 J of work?   Round your answer to the nearest…

A: Given Data, Mass (m)=360 kg Work Done (W)=15100 J

Q: Show that 2.4 J of work is done when a force of 2.0 N moves a book 1.2 m.

A: Work done = Force x Distance moved by the force = Fd W = 2.0 N x 1.2 m W = 2.4 N.m = 2.4 J

Q: An electric motor with an efficiency of 85% drives an elevator that raises 10 tons at a height of 85…

A:

Q: On a table rest 6 books of mass 0.27 kg and thickness 3.8 cm. How much work does it take to stack…

A: Number of books = 6Mass of each book = 0.27 kg Thickness of each book = 3.8 cm = 0.038 m

Q: As a gasoline engine is running, an amount of gasoline containing 15,000J of chemical potential…

A:

Q: A boy of mass m climbs up the stairs of vertical height h. What would have been work done if he uses…

A: The only force acting on the boy is gravitational force or his own weight "mg". So, when a body…

Q: Ten and one-half foot-pounds of work is required to compress a spring 6 inches from its natural…

A:

Q: How much power does it take a steam engine to do 6.8 × 10' J of work in 2.61 x 10° seconds? (answer…

A: Given data:  Work (W) = 6.8×107 J Time (t) = 2.61×108 s Required: Power (P)

Q: If a runner exerts 350 J of work to make 150 W of power, then how long did it take the runner to do…

A:

Q: How much work is done by a table as it holds up a 3.8 kg cat? O OJ O 3.8J O 37J O The answer depends…

A: Given Mass m of cat = 3.8 kg gravitation acceleration g = 9.8 m/s2

Q: suppose you lift a laptop that weighs 5.5 pounds off the floor onto a shelf that is 5 feet high. How…

A: The weight of the laptop in kilograms is 5.5 pounds = 5.5×0.453592kg≈2.5kg The height in meters is 5…

Q: Suppose that 3J  of work is needed to stretch a spring from its natural length of  30cm to a length…

A:

Q: How much work is done by a person lifting a 4.1 kg object from the bottom of a well at a contact…

A: Given Data: The mass of an object is, m=4.1 kg The contact speed is, v=2.2 m/s The time required for…

Q: What do you think is the difference between the everyday usage and the Physics usage of the phrase…

A: Conservation of energy : it's states that not the energy will create nor the destroyed. Only it's…

Q: How much work is done in lifting a 61.2 kg crate a vertical distance of 10 meters? (Remember: F =…

A: mass of crate (m) = 61.2 kg Vertical distance (h) = 10 m g = 9.8 ms2

Q: A spring has a natural length of 4 m. If a 4-N force is required to keep it stretched to a length of…

A:

Q: A 40 lb stone is hoisted to the top of a building 100 ft high. By how much does its potential energy…

A: Given, mass of the stone, m = 40 lb height of the building, h = 100 ft

Q: The done work for man has power * (5.2 Watt) during (1 hours) is

A: Given: Power P=5.2 Watt Time  t=1 hours=1×60×60=3600 s

Q: If 5J of work are done on a spring, compressing it by 12cm, what is the spring constant?

A: Given that:Work done on spring, W=5 JSpring compression, x=12 cm

Q: How much energy does it take to drive a 200 Hp car at 20 % power for 3 hours if it is 12 %…

A: Given Power rating of car = 200 Hp = 200 × 746 W Output run power is only 20% of rated power time =…