(a) How long (in s) will it take an 865 kg car with a useful power output of 38.0 hp (1 hp = 746 W) to reach a speed of 13.0 m/s, neglecting friction? (Assume the car starts from rest.) 2.88
Q: A 73.0-kg skier starts from rest from the top of a 49-m high slope. What is the speed of the skier…
A:
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: I nees help on both problems. I don't know how to start.
A: a) Work done The expression for the force applied on the skier should be equal to the force due to…
Q: A ball (mass= 0.5kg) is dropped from a 100m high building. (a) How much work is done on the ball by…
A: Given quantities, mass, m= 0.5kg Height of the building =100m Acceleration due to gravity, g=9.8…
Q: A 4 kg ball falls from height of 23 m. What willbe potential energy of the ball after 0.8 second?…
A:
Q: What average power does a 1,565 kg car need to go from 0 to 12.6 m/s in 6.86 seconds? Assume a…
A:
Q: Suppose that 3 J of work is needed to stretch a spring from its natural length of 24 cm to a length…
A:
Q: While running, a person dissipates about 0.60 J of mechanical energy per step per kilogram of body…
A:
Q: Suppose a car travels 108 km at a speed of 30.0 m/s, and uses 2.0 gal of gasoline. Only 30% of the…
A: Given information: The distance the car travels (d) = 108 km The speed of the car (v) = 30 m/s The…
Q: A 520-kg dragster accelerates from rest to a final speed of 105 m/s in 390 m, during which it…
A:
Q: A new record for running the stairs of the Empire State Building was set on February 4, 2003. Thee…
A:
Q: A 4 kg ball falls from height of 23 m. What willbe potential energy of the ball after 0.8 second?…
A:
Q: A force acting on a 1.0-kg object is described by the equation F = (2.0x3.5) i N. (a) Plo the force…
A:
Q: A single force F(x) = −8.0x (in newtons) acts on a 3.0-kg body. When x = 6.75 m, the speed of the…
A: Given, Force, Fx = -8xMassm = 3 kg , when x = 6.75 m , v = 4 m/swhen x=2.5m , v = ?
Q: 50. A skier of mass 70 kg is pulled up a slope by a motor- driven cable. (a) How much work is…
A:
Q: How much work did the movers do (horizontally) pushing a 42.0-kg crate 10.4 m across a rough floor…
A:
Q: What average mechanical power (in W) must a 61.5 kg mountain climber generate to climb to the summit…
A: The mechanical power of the climber can be found as, Here, W and t represent the work-done and…
Q: How long will it take a 751-kg car with a useful power output of 57.5 hp (1 hp equals 746 W) to…
A:
Q: A skier of mass 63 kg is pulled up a slope by a motor-driven cable. (a) How much work is required to…
A: Given:- mass of the skier m= 63 kg height h= 40 m slop is The speed of the skier is v= 2.3 m/s…
Q: A 100.0 g mass falls off the table in the physics lab. You measure the table to be 94.0 cm high.…
A: Given data: A mass falls off the table Mass (m) = 100.0 g = 0.100 kg Vertical distance (d) = 94.0…
Q: Suppose a car travels 108 km at a speed of 30.0 m/s, and uses 1.90 gallons of gasoline. Only 30% of…
A:
Q: A 5 kg ball falls from height of 28 m. What willhe potential energy of the ball after 1.2 second?…
A:
Q: How high would you have to lift a 2000 kg car to give it a potential energy of: (a) 0 x 103 J,…
A:
Q: A toy rocket with a mass of 328 grams is launched into the air using a spring. At the apex of the…
A: kinetic energy is given as K= 1/2 M V^2 here M is the mass and V is the speed of body
Q: Suppose the mass of a loaded elevator is 1700 kg.What force, in newtons, must be supplied by the…
A: Given mass of a loaded elevator is 1700 kg We have to find What force, in newtons,much work, in…
Q: metres and the velocity is 10.3 m/s. What is the kinetic energy (in J) of the rocket at this…
A: The answer is below
Q: How high would you have to lift a 2000 kg car to give it a potential energy of: (a) 4. 0 x 103 J ,…
A:
Q: A car with mass 1520 kg is traveling down the highway at a speed of 18 m/s when the driver slams on…
A: Given mass of car m = 1520 kg initial speed of car u = 18 m/s as car comes to the rest then final…
Q: Suppose a car travels 108 km at a speed of 35.0 m/s, and uses 2.10 gallons of gasoline. Only 30% of…
A: The required energy is, E=30%1.3×108 J/gallon2.10 gallon=8.19×107 J The distance traveled by car is,…
Q: You are driving to work at 60 mph and need to accelerate to 75 mph. How long will it take to reach…
A: The initial velocity of the vehicle is u = 60 mph. The final velocity of the vehicle is v = 75 mph.…
Q: What average mechanical power (in W) must a 60.0 kg mountain climber generate to climb to the summit…
A: solution as
Trending now
This is a popular solution!
Step by step
Solved in 2 steps with 2 images
- (a) What is the average useful power output (in W) of a person who does 6.80 x 106 J of useful work in 8.40 h? w (b) Working at this rate, how long (in s) will it take this person to lift 1700 kg of bricks 1.40 m to a platform? (Work done to lift his body can be omitted because it is not considered useful output here.)A fuel-powered loader raises a 2.2 x 103-kg load from the ground to a loading platform, which is 2.7 m above the ground. Theloader consumes 1.5 X 105 J of energy from the fuel while raising the load. (a) Determine the work done by the loader on theload. (b) Calculate the efficiency of the loader.a) What is the kinetic energy of an automobilewith a mass of 1299 kg traveling at a speed of11 m/s?Answer in units of J. b) What speed would a fly with a mass of0.629 g need in order to have the same kineticenergy as the automobile?Answer in units of m/s.
- A 2,200-lb sports car with a power of 135 hp can accelerate from zero to 110 mph. How longapproximately will it take to accomplish this?(a) How long (in s) will it take an 860 kg car with a useful power output of 42.0 hp (1 hp = 746 W) to reach a speed of 17.0 m/s, neglecting friction? (Assume the car starts from rest.) 3.966 (b) How long (in s) will this acceleration take if the car also climbs a 2.60 m-high hill in the process? 14.02 X s(a) How long (in s) will it take an 855 kg car with a useful power output of 36.0 hp (1 hp = 746 W) to reach a speed of 13.0 m/s, neglecting friction? (Assume the car starts from rest.) (b) How long (in s) will this acceleration take if the car also climbs a 2.80 m-high hill in the process? Additional Materials O Reading