A rickshaw puller pulls the rickshaw by applying a force of 140 N. If the rickaw moves with constant velocity of 90 km/h-1. Find the power of rickshaw puller ?
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- How much work is done against the gravitationaI force on a 5.0-kg briefcase when it is carried from the ground floor to the roof of the Empire State Building, a vertical climb of 380 m?A rickshaw puller pulls the rickshaw by applying a force of 56 N. If the rickaw moves with constant velocity of 36 km/h-1. Find the power of rickshaw puller ?Calculate the force needed to bring a 450-kg canoe to rest from a speed of 10.8 km/h in a distance of 120 m. Express your answer in N.
- A young jedi knight applies a force of -34Nx + 14Nỹ through a displacement of -12mx - 4.5mŷ over a period of three minutes. What is the magnitude of this jedi's power?3. A 75kg basketball player generates an average vertical ground reaction force of 1697N over a 0.45 second period of time while jumping to grab a rebounding ball. How high will she jump?In transporting a patient on a wheelchair up an inclined ramp at an angle of 20° with the horizontalground, an attendant exerts a force of 1400N, resulting in a velocity of 2.5 m/s. Calculate the powerproduced by the attendant.
- (a) Calculate the force needed to bring a 800 kg car to rest from a speed of 85.0 km/h in a distance of 125 m (a fairly typical distance for a nonpanic stop). (b) Suppose instead the car hits a concrete abutment at full speed and is brought to a stop in 2.00 m. Calculate the force exerted on the car and compare it with the force found in part (a), i.e. find the ratio of the force in part(b) to the force in part(a). (force in part (b) / force in part (a))A 0.6 ton motor is moving on a le way at a speed of 108 km/hr. How retarding force (in Newton) is reo ?to stop it in a distance of 0.00Jogging on hard surfaces with insufficiently padded shoes produces large forces in the feet and legs. (a) Calculate the magnitude of the force needed to stop the downward motion of a jogger’s leg, if his leg has a mass of 13.0 kg, a speed of 6.00 m/s, and stops in a distance of 1.50 cm. (Be certain to include the weight of the 75.0-kg jogger’s body.) (b) Compare this force with the weight of the jogger.
- A child sits in a wagon with a pile of0.34-kg rocks. If she can throw each rock with a speed of 9.5 m>srelative to the ground, causing the wagon to move, how manyrocks must she throw per minute to maintain a constant averagespeed against a 3.4-N force of friction?A student wearing frictionless in-line skateson a horizontal surface is pushed by a friendwith a constant force of 47 N.How far must the student be pushed, starting from rest, so that her final kinetic energyis 354 J ?Answer in units of m.AS7 kg skier starts from rest at height - 22 m ahove the end of a ski-jump ramp (see the figure). As the skier leaves the ramp, his velocity makes an angle of 0 - 15° with the horizontal. Neglect the effects of air resistance and assume the ramp is frictionless. (a) What is the maximun hcight i of his junmp albove the end of tlhe ramp? (b) If he increased his weight by putting un a 10 kg backpatk, what would h be? Fnd of - (a) Number Units (b) Number Unils