A machine gun fires 360 bullets per minute. Each bullet moves with a velocity of 600 ms^−1 . If the power of the gun is 5.4 kw, Calculate the mass of each bullet.
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Q8.) A machine gun fires 360 bullets per minute. Each bullet moves with a velocity of 600 ms^−1 . If the power of the gun is 5.4 kw, Calculate the mass of each bullet.
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- A 1000-kg car accelerates from 0 to 15 m/s in 5.0 s with negligible friction and air resistance. What is the average power delivered by the engine? 7500 W O 45000 W O 1500 W O 22500 W O 112500 WPower of the Human Heart. The human heart is a powerful and extremely reliable pump. Each day it takes in and discharges about 7500 L of blood. Assume that the work done by the heart is equal to the work required to lift this amount of blood a height equal to 1.5 m. The density (mass per unit volume) of blood is 1050 kg/m3 . What is the heart's power output. Use g = 9.8m/s2An airplane of mass 4500 kg is cruising at a speed of 49.0 m/s at an altitude of 175 m. What is its total mechanical energy ? Show solution and choose from the choices below: 2.27 × 10^8 J 6.91 × 10^7 J 5.26 × 10^7 J 3.91 × 10^7 J 1.31 × 10^7 J
- A 899 kg car accelerates from rest up to 26.0 m/s in 6.14 s. What is the average power output of this engine during this time? Number Units (for comparison information there are 746 W for each horse power )An object is dropped from a height of 50 m with zero initial velocity. Assuming 5% of the energy is lost to drag, what's the speed of the object when it hits the ground? A 19.4m/s (B) 9.8m/s © 47.5m/s (D 30.5 m/sHow fast would a 30-kg kid need to run in order to have the same kinetic energy as an 8.0-g bullet fired at 400 m/s, in m/s? Your answer needs to have 2 significant figures, including the negative sign in your answer if needed. Do not include the positive sign if the answer is positive. No unit is needed in your answer, it is already given in the question statement.
- 1. A 4.0 kg particle is moving at a velocity v = V2î – V2ĵ + 3k m/s. (a) (b) What is the particle's kinetic energy at this moment? What is the net work done on the particle if its velocity changes to - V2î + 3k m/s? V = - Assume that a force in the x y plane acts on the particle to slow it down (imagine (c) that this force is a type of friction). Will the particle's kinetic energy become zero under the influence of this force? Explain your answer.Power of the Human Heart. The human heart is a powerful and extremely reliable pump. Each day it takes in and discharges about 7500 L of blood. Assume that the work done by the heart is equal to the work required to lift this amount of blood a height equal to 1.5 m. The density (mass per unit volume) of blood is 1050 kg/m3 . What is the heart's power output. Use g = 9.8m/s2 Calculate answer to one decimal.1. The pitcher throws the 0.145 kg baseball towards the catcher at 42 m/s. (a) How much kinetic energy does the baseball have? (b) How much work does the catcher's mitt do on the ball during the catch? (c) If the catcher's mitt recoils 12 cm during the catch, how much force did the ball exert on the catcher?
- A car engine produces a constant power of P = 341 hp. The car and motor have a combined mass of m = 1830 kg. 1.) The car starts from rest, after t=5 seconds, what is the cars speed, you may assume no energy is required to spin the tires. 2.) Assume a dragster of mass m=1000kg can accelerate to cover 450 m and accelerate in 7.2 s from a dead stop, how much horsepower is the engine producing, assuming acceleration is constant?A car accelerated from rest to a speed of 20 m/s in a time of 5.6 s. The car has a weight of 9000N. Determine the average power needed to accelerate the car.A 700 kg dragster accelerates from rest to a final speed of 120 m/s in 400 m (about a quarter of a mile) and encounters an average frictional force of 1200 N. What is its average power output in watts and horsepower of the car engine?a) watts= b) horsepower=