A world-class sprinter running a 100 m dash was clocked at 5.4 m/s 1.0 s after starting running and at 9.8 m/s 1.5 s later. In which of these time intervals, 0 to 1.0 s or 1.0 s to 2.5 s, was his output power greater?

Q: A diesel engine pumps out 40 kg of water in one second. The water comes out vertically upwards with…

A: Since you have asked multiple questions, we will solve the first question for you. If you want any…

Q: An electric engine in a 2.0 kg remote-control toy car has a power output of 4.0 W. How fast will it…

A: Energy = Power * time P=power = 4 W time=t=5 s   Energy=E= 4*5=20   mass=m=2.0 kg

Q: Does the kinetic energy of a car change more when it goes from 10 to 20 km/h or when it goes from 20…

A: The change in kinetic energy when the car moving from 10 to 20 km/h is ΔKE=12m20 km/h2-10…

Q: A 0.25-hp motor is used to lift a load at the rate of 5.0 cm/s. How great a load can it raise at…

A: Given: The power is 0.25 hp. The constant speed of the motor is 5 cm/s.

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 particle with a mass of 6 kg; It changes position over time according to the equation x = 2t ^ 3 +…

A: Given Data: The position is, x=2t3+5t2+10t. The mass is, m = 6 kg. The time considered is, t = 3 s.…

Q: Each second, 1200 m3 of water passes over a waterfall 100 m high.Three-fourths of the kinetic energy…

A:

Q: When a 1984 Alfa Romeo Spider sports car accelerates at the maximum possible rate, its motion during…

A:

Q: Calculate the kinetic energies (in J) of the following. a 2,004.0 kg automobile moving at 140.0…

A:

Q: When the speed of your car is doubled, by what factor does its kinetic energy increase? a. sqrt of 2…

A:

Q: How fast does a 48kg tiger running if it has a kinetic energy of 15 kilojoules? Express your answer…

A:

Q: A 56.5-kg person is running and accelerates from 3.67 m/s to 8.29 m/s in 5.67 s. How much power does…

A:

Q: If a ski lift raises 100 passengers averaging 660 N in weight to a height of 150 m in 60.0 s, at…

A: Given information: Here, mg is the average weight of the passenger, h is the height attained by the…

Q: Janine is riding a bicycle. Over a period of 8.90 second, she increases her speed from 0 m/s to 7.57…

A: Given data:  Time (t) = 8.90 s Initial velocity (Vi) = 0 m/s Final velocity (Vf) = 7.57 m/s Mass (m)…

Q: Which has more kinetic energy: a 0.0010-kg bullet traveling at 389 m/s or a 5.8  107-kg ocean liner…

A: Determine the kinetic energy of the bullet traveling at 389 m/s as follows.…

Q: Calculate the kinetic energies of (a) a 2000.0-kg automobile moving at 100.0 km/h; (b) an 80.-kg…

A: kinetic energy if mass m moving with speed v is given by  KE = 0.5 mv2  KE = kinetic energy  m is in…

Q: What is the maximum kinetic energy of a bowling ball with a mass of 6.1 kg, dropped from the 116m…

A: Maximum kinetic energy of ball will be just before the ball hits the ground, as at that time speed…

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: A 0.5 kg pendulum bob is raised to 1.0 m above the floor, as shown in the figure above. The bob is…

A: Given data:  Mass (m) = 0.5 kg Initial height = 1.0 m Initial velocity = 0 m/s Final height = 0.8 m…

Q: A 116.3 kg-tiger runs with an initial velocity of 0 m/s to 47 m/s in a span of 7.5 seconds. What is…

A: Given: The mass (m) of the tiger is 116.3 Kg. The initial velocity (u) is 0 m/s. The final velocity…

Q: An electric engine in a 2.0 kg remote-control toy car has a power output of 4.0 W. How fast will it…

A:

Q: A man of mass 60.0 kg takes 4 seconds to run up a 4-m high stairs. Which of the following gives the…

A:

Q: How much kinetic energy does a student of mass 60. kilograms running at 3.0 meters per second…

A:

Q: If a person of mass 50kg climbs a 2m high set of stairs in 4.0s on their first attempt, and on their…

A: Fw = Mg ( force due gravity) H = 2 m t1 = 4 s  t2 = 8 s  We know work done in vertical direction is…

Q: A 6.0-kg block is released from rest 80 m above the ground. When it has fallen 60 m its kinetic…

A: Given data:  Mass (m) = 6.0 kg Height fallen (Δh) = 60 m Required: The kinetic energy of the block

Q: A particle of mass 0.4 kg moves a long a straight line according to x(t) = 2t + t3, where t is in…

A: Power is defined as time derivative of the work done on a system, or work done per unit time. Work…

Q: An electric engine in a 2.0 kg remote-control toy car has a power output of 4.0 W. How fast will it…

A: Mass of engine = 2 kg  Power output = 4 W  Time = 5 seconds

Q: How fast would a(n) 73 kg man need to run in order to have the same kinetic energy as an 8.0 g…

A: Given data The mass of the man is, m1 = 73 kg. The mass of the bullet is m2 = 8 g. The velocity of…

Q: A 1200-kg sports car is advertised to accelerate from 0-100 km/h (27.78 m/s) in 3.00 s. What is the…

A: Solution

Q: a mass of 0.1420 kg and has this speed just before a batter makes contact with it, how much kinetic…

A:

Q: Each second 1080 m of water passes over a waterfall 103 m high. Three-fourths of the kinetic energy…

A: Given:- Rate of water flow r=1080 m3/ s. Height of the waterfall is h=103 m. Mass of the water…

Q: You are travelling in a car 90.0 m/s If you have a mass of 1.200.0 kg and the car ha a mass of 79.5…

A: Given data The traveling speed of the car is given as v = 90 m/s. The mass of the person is given…

Q: What are the average powers a car weighting 1.2 × 10³ kg has to use (power of the car's engine) to…

A: Given: mass of the car (m) = 1200 kg v1 = 0 m/s v2 = 14 m/s v3 = 28 m/s Time in both cases (t) = 4 s

Q: What is her useful power output if she does 25 pushups in one minute?

A: It is given that,

Q: By what factor does the 1) no change at all kinetic energy of a car 2) factor of 3 change when its…

A: Kinetic energy of car = 1/2 mv2 Given, it's speed is tripled.  So new speed is 3v.

Q: A pitcher supplies a power of P = 226 W to a baseball of mass m = 0.085 kg for a period of t = 0.28…

A: Given value--- power = 226 W. mass = 0.085 kg. time = 0.28 sec. We have to find--- What is the…

Q: Killer whales are known to reach 32 ft in length and have a mass of over 8,000 kg. They are also…

A: Given, Mass of Shamu(m)= 7.99*10³ kg Initial velocity of Shamu(vi)= 0 m/s Final velocity of…

Q: An object which weighs 10 N is dropped from rest from a height of 4 meters above the ground. When it…

A: The potential energy at the beginning of the fall is

Q: The dome at Monticello is 13.6 m high. If a pebble with a mass of 15g is thrown horizontally from…

A: From the conservation of energy:

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: For a given person, as the time needed to run up a flight of stairs decreases, the power

A: power=work done  Time taken since the work done to run up a flight of stairs is same and the time…

Q: Calculate the final speed of a 110kg rugby player who is initially running at 8.00 m/s but collides…

A: Given that  mass m is 110 kg. initial speed is 8.00 m/sec  . a backward force of 1.76×104N for…

Q: Does the kinetic energy of a car change more when it goes from 10 to 20km/h or when it goes from…

A: Calculating the change in kinetic energy for the given velocity ranges:

Q: A block with mass m = 0.10 kg is released from rest at point y = 1.0 m and slides down along a…

A: Given Mass of block m = 01 kg height y = 1 m track is friction less