(a) What is the power output in watts and horsepower of a 70.0-kg sprinter who accelerates from rest to 10.0 m/s in 3.00 s? (b) Considering the amount of power generated, do you think a well-trained athlete could do this repetitively for long periods of time?

Q: An accelerating object of mass m=20 kg is fired with an initial speed v;=3 m/s at a starting point.…

A: Given: mass of an object, m = 20 kginitial speed, vi = 3 m/sfinal kinetic energy, KEf = 122 J

Q: ohn, of mass 82.4 kg can do work for about 2.0 minutes at the rate of 1.0 hp. How long will it take…

A: Given data: Mass (m) = 82.4 kg Power (P) = 1.0 hp Height (h) = 12.0 m 1 hp = 746 watts Required:…

Q: A student weighing 551 N climbs at constant speed to the top of an 14 m vertical rope in 17 s. What…

A:

Q: A 67 kg yak has an average power output of 200 W. How long can a yak climb a 3km high mountain?…

A:

Q: der the action of a force, a 2 kg body moves such that its t3 where x 3 position x as a function of…

A: Work done is defined as the product of magnitude of displacement d and the component of force in the…

Q: A 10 kg mass is released from rest from the top of a 2 m long ramp, inclined at 30°. The speed of…

A: 7) work done by the friction = final kinetic energy - initial potential energy W = (1/2)(10)(2)2 -…

Q: find the work done by the force f=y2i+x3j,where force is measured in newtons ,in moving an object…

A:

Q: A world-class sprinter running a 100 m dash was clocked at 5.4 m/s 1.0 s after starting running and…

A:

Q: Using the principle of conservation of mechanical energy, calculate the maximum height achieved by a…

A: Weight of ball = 5 N Velocity of ball = 12 m/s Maximum height =?

Q: A 450 kg dragster accelerates from rest to a final speed of 120 m/s in 400 m (about a quarter of a…

A: mass of dragster = 450 kg Initial velocity = 0 m/s final velocity = 120 m/s distance moved = 400 m…

Q: Football players measure their acceleration by seeing how fast they can sprint 40 yards (37 m). A…

A:

Q: A 40.0 kg jogger runs up the slope described in the fiqure. She maintains a constant speed of 4.00…

A: Given  Mass of jogger(m) = 40Kg Speed (s) = 4m/s

Q: At what speed does a 1000 kg compact car have the same kinetic energy as a 2.00×10* kg truck going…

A: Given : mass of compact car, mc = 1000 kg             mass of truck, mt = 2.0 × 104 kg…

Q: An object has an in initial velocity of 4.0 m/s and a constant acceleration of 2.0m/s​^2. How far…

A: Equations of motion in 1-dimension are- 1) v=u+at2) s=ut+12at23) v2=u2+2as where, u is initial…

Q: The power delivered by a constant force is given by P=FO-vO, The power exerted by gravity as it…

A:

Q: It takes 157 kJ of work to accelerate a car from 23.4 m/s to 27.3 m/s. What is the car's mass?

A: Given, Work done, W=157 kJ Initial velocity, u=23.4 m/s Final velocity, v=27.3 m/s

Q: A 10N horizontal force is exerted on a 100kg object that slides on a frictionless, horizontal…

A: First method: According to the Newton’s second law, the acceleration of the object is, F=maa=Fm=10…

Q: If a car generates 17.3 hp when traveling at a steady 81.3 km/hr, what must be the average force…

A:

Q: How long will it take a 844-kg car with a useful power output of 48.5 hp (1 hp equals 746 W) to…

A:

Q: A 1.50 × 10³ kg car accelerates uniformly for 15 m in 3.0 s. What is che power delivered by the…

A: given; m=1.50*103 kg s = 15 m t=3.0 s

Q: It takes 212 kJ of work to accelerate a car from 21.7 m/s to 29.2 m/s. What is the car's mass?

A:

Q: At an amusement park, a swimmer uses a water slide to enter the main pool. If the swimmer starts at…

A: The law of energy conservation,

Q: A truck of mass 900 kg starts with an initial velocity of 2.00 m/s and travels in a straight line…

A: Mass of the truck,

Q: A girl weighing 400 N takes 3 seconds to run up a 4-m high stairs. Which of the following gives the…

A:

Q: As a part of a charity fund-raising drive, a marathon runner with mass of 75 kg runs up the stairs…

A: Work done required for mass m to climb height h will be against gravity. Wreq = mgh we Also know,…

Q: Suppose a 925-kg car climbs a 2.05° slope at a constant speed of 30.5 m/s.   Calculate the power…

A: Since, the car climbs the slope with a constant velocity, the expression for the power required is,

Q: A 1.00 x 10*3 kg elevator car carries a maximum load of 8.00 x 10*2 kg. A constant frictional force…

A:

Q: car (m = 660.0 kg) accelerates uniformly from rest up an inclined road which rises uniformly, to a…

A: Given Mass of the car is m=660.0 kg Height of the hill is h=39.0 m Final speed of the car is vf=24.9…

Q: Which has more kinetic energy, a 0.0020-kg bullet traveling at 400 m/s or a (6.4 x 107 )-kg ocean…

A:

Q: Suppose a 825-kg car can produce a useful power output of 45.5 hp (1 hp = 746 W). How long, in…

A: a)Calculate the work done using work energy theorem.

Q: Suppose a 975-kg car can produce a useful power output of 42.5 hp (1 hp = 746 W). How long, in…

A: Data Given ,  Mass of the car ( m ) = 975 kg Power of the car ( P ) = 42.5 hp   = ( 42.5 × 746 ) W =…

Q: A skier of mass 70.0 kg is pulled up a slope by a motor drivencable. (a) How much work is required…

A: (a) The vertical distance travelled by the skier is

Q: As part of a charity fund-raising drive, a Chicago marathon runner of mass 50.0 kg runs up the…

A: Given data:  Mass of runner (m) = 50.0 kg Height of building (h) = 443 m Time (t) = 15.0 minutes…

Q: What average mechanical power (in W) must a 60.0 kg mountain climber generate to climb to the summit…

A: solution as

Q: A 5.0 kg object is moving at 2.29 m/s? By what factor does its kinetic energy change if its speed…

A:

Q: What is the power output for a 60.0-kg woman who runs up a 3.00 m high flight of stairs in 3.50 s,…

A: The mass of the woman is m=60 kg. The height is h=3 m. The time is t=3.50 s. The final speed is vf=2…

Q: A 100 kg boulder falls off the side of a cliff on Mars where the acceleration due to gravity is 3.8…

A: It is given that,

Q: A tower crane has a hoist motor rated at 169 hp. If the crane is limited to using 65.0% of its…

A: Power of crane (P) = 169 hp Power usage = 65% of maximum power Mass of load (m) = 5.50×103 kg…

Q: Suppose a 825-kg car can produce a useful power output of 45.5 hp (1 hp = 746 W). How long, in…

A: