A tired squirrel (mass of approximately 1 kg) does push-ups by applying a force to elevate its center-of-mass by 5 cm in order to do a mere 0.50 Joule of work. If the tired squirrel does all this work in 2 seconds, then determine its power.

Q: A 1,505 kg car starts at rest and speeds up to 4.2 m/s with a constant acceleration. If the car…

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Q: need asap pls A 5.0 kg experiences an applied force of (3i + 7j) N as it slides across a horizontal…

A: Given: Applied force, F=3i + 7j N Displacement across a horizontal surface, d=7.0 m   To determine…

Q: A 50.0-kg marathon runner runs up the stairs to the top of Chicago’s 443-m-tall Willis Tower.…

A: Given: m = 50.0 kg h = 443 m t =15.0 minutes = 15.0*60 sec = 900 sec

Q: It takes a force of 35 N to stretch a 45-cm spring to 90 cm and hold it there. How much work was…

A: Given The force to stretch the spring is F=35 N. The initial length of spring is xi=45 cm. The…

Q: A 400 kg dragster accelerates from rest to a final speed of 120 m/s in 400 m (about a quarter of a…

A:

Q: A tandem (two-person) bicycle team must overcome a force of 195 N to maintain a speed of 8.75 m/s.…

A: Given, Force = 195 N speed = 8.75 m/s a) Power = Force ×velocity

Q: A 650 kg dragster accelerates from rest to a final speed of 110 m/s in 400 m (about a quarter of a…

A: Given, vf= 110 ms, d=400 m, fk=1200 N, vf= 0 ms, t=7.30 s…

Q: You do 5.8 J of work to stretch a spring with k = 190 N/m, starting with the spring unstretched. How…

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Q: a 1200 kg sports car is advertised to accelerate from 0-100km/h in 3.00s. What is the power output…

A: Given value--- mass = 1200 kg. initial speed = 0 m/s. final speed = 27.78 m/s. time = 3 sec. We…

Q: A force of 77 pounds is required to hold a spring stretched 0.3 feet beyond its natural length. How…

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Q: You do 11.7 J of work to stretch a spring with k = 190 N/m, starting with the spring unstretched.…

A: Given data: The work done is W=11.7 J. The spring constant is k=190 N/m.

Q: A person uses a motorized bicycle to climb a road inclined 30 ° above the horizontal with constant…

A: Mass of the person +bicycle M=102 kg Angle of inclination θ=300 Displacement of the person d=86 m…

Q: Say I lift a box from the ground straight up to 1m in 2s. If I lift the same box from the ground but…

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Q: If a force of 5 Ib produces a stretch of one-tenth the natural length L ft of a spring, how much…

A: The force on a spring is given by F = kx, where k = spring constant of the spring x = deformation of…

Q: You do 6.5 J of work to stretch a spring with k = 210 N/m, starting with the spring unstretched.

A:

Q: If a 75 kg runner can accelerate from standing start to a speed of 10 m/s in 3 seconds, how much…

A: Since the runner starts from a standing position, the initial velocity of the runner is u=0 m/s.…

Q: A barrel weighing 250 lbs is suspended by a rope 30 ft long. How much work is necessary to hold the…

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Q: A 62.6 kg runner has a speed of 5.10 m/s at one instant during a long-distance event. How much net…

A: We know:

Q: 11. A ball weighing 20 N is dropped from rest from a height of 8 meters above the ground. Assuming…

A: Total mechanical energy is the sum of kinetic energy and potential energy.

Q: A cyclist in a race must climb a 4° hill at a speed of 5 m/s. If the mass of the bike and the biker…

A: The mass of the bike and the biker together, m=73 kg   The speed, v=5 m/s   The angle, θ=4°

Q: If the ball is dropped with an initial potential energy of 19800J what would be its maximun kinetic…

A: Solution: According to the conservation of energy, total energy of the ball is constant. Hence,…

Q: A loadedcart has a total mass of 227 kg. If a 312 N force acting at an angle of pi/6 radian to the…

A: Force, F = 312 N Angle of action is θ=π6=30° Displacement is s = 15 m

Q: In climbing up a rope, a 62-kg athlete climbs a vertical distance of 5.0 m in 9.0 s. What minimum…

A: Given Data: The mass of an athlete is m=62 kg The vertical distance is, d=5 m The time required to…

Q: a box of mass 3.5 kg being accelerated along the floor at 3.9 m/s2. If this block is being…

A: Given data- Mass of box =3.5 kg Acceleration a=3.9 m/s2 Initial velocity Vi=0 m/s (rest) Time period…

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: . Is it possible to do work on an object that remains at rest?

A: Work

Q: If it takes 10.0 J of work to move an object 2.0 meters, what is the weight of the object?

A: The work done to move an object to a distance d is given as,…

Q: When doing a chin-up, a physics student lifts her 420N body a distance of 0.25 meters in 2 seconds.…

A: Recall, Power=W/t And Work done=mgh

Q: Its takes 45 sec for a girl A to climb up a stairs while boy B takes 35 sec for the same job.…

A: In  this question  we discuss  about work done and power.

Q: Joule is a unit of the following: work, power, potential energy, and kinetic energy, true or false?

A: Work: Work = Force ×Displacement      W = F ×S Units of work:    1 J = 1 N m   Power: Power = Work…

Q: If 3.0 J of work is done in raising a 225 g apple, how far is it lifted?

A: Given W =3.0J mass = 225g so, F = 0.225 kg x 9.8 m/s2 = 2.205N

Q: If the difference in kinetic energy is 0.22 J, what is the work done? ( Initial kinetic energy is…

A: Given data The initial kinetic energy is given as KEi = 0.17 J. The final kinetic energy is given…

Q: A bowler accelerates a 8.5 kg bowling pin from rest to 15 m/s. If this motion takes 1.75 s, what is…

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Q: A force of 4 pounds is required to hold a spring stretched 0.2 feet beyond its natural length. How…

A:

Q: A crane lifts a load of 6000 N through a vertical distance of 15 m in 30 s.What is the average…

A:

Q: What average power is required for a runner with a mass of 80 kg to reach a speed of 9 m/s during a…

A: Solution: Given that m = 80 kg v = 9 m/s t = 2 s

Q: fit takes 5 Jof work to stretch a Hooke's-law spring 10 cm from its unstressed length, determine the…

A:

Q: A 40-kg mass is lifted through a distance of 20 m in a time of 3 s. What average power is employed?

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Q: What is the dominant factor that affects the speed of an object that started from rest down a…

A: Work done on an object

Q: At the time of throwing a ball up, it has acquired the kinetic energy of 30 J. To what height it…

A: According to energy conservation law, total energy imust reamin the same. At the initial point,…

Q: now much work does he do on the crate?

A: We know the work done W=F. d------------------(1) ANS: The work done is 919.24 N-m or 920 Joule.

Q: Lifting 30-kg boxes on a vertical distance of 0.90 m from the ground unto the truck is Ervin's work.…

A:

Q: The engine of the car has a power of 355 hp. If it 800 kg and moves horizontally, what will be its…

A: Power of engine "P"= 355h.p = 264.72kW. mass of car "m"= 800 kg  time taken "t"= 7sec . initial…

Q: A weightlifter raises a 150-kg barbell from the floor to a height of 2.2 m in 0.80 s. What is his…

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Q: You do 6.4 J of work to stretch a spring with k = 190 N/m, starting with the spring unstretched. How…

A: Given data: Work done (W) = 6.4 J Spring constant (k) = 190 N/m Initially spring is unstressed…

Q: Why does one get tired when pushing against a stationary wall when no work is done on the wall?

A: Work done can be calculated as the product of the displacement and the force applied.