Q 23.) A boy of mass 50 kg runs up a staircase of 45 steps in 9 s. If the height of each step is 15 cm, find his power. Take g=10ms−2.
Q: What is the kinetic energy of 1 kg of air (about 1 m3) moving at 15 m/s (about 32 mph)? If it takes…
A:
Q: The work performed as a function of time for a certain process is given by: W = at³, where a = 2…
A:
Q: A mechanic pushes a 2280 kg car from rest to a speed of v, doing 5252 J of work in the process.…
A:
Q: thermal energy due to friction
A:
Q: onsider a lightbulb rated for a power Pbulb = 60 W. This lightbulb consumes a certain amount of…
A:
Q: Problem 3: A car of mass 3200 kg is moving with some unknown initial velocity. Note: the car is just…
A: The mass of a car is, The height of the hill is, The car’s velocity at the top of the hill is,
Q: (Figure 1) shows your 1.5 kg laptop computer being dragged up a 25° slope at steady speed by a rope…
A: As Tension force and displacement are in same direction then work done : WT=T×∆r =20×2…
Q: A particle of mass 4.0 kg is constrained to move along the x-axis under a single force F(x) = -cx³,…
A: Force is defined as the product of mass and acceleration. Thus the relation given can be rewritten…
Q: Calculate P3 (in W). W ( b)Find the total power (in W) supplied by the source. W
A: Given R1=1.60Ω R2=4Ω R3=13.8Ω Voltage of source V=12 V
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: Suppose a car travels 108 km at a speed of 40.0 m/s, and uses 2.00 gallons of gasoline. Only 30% of…
A:
Q: A man lifts a pail of water of mass m= 3 kg upward at a constant speed of 2 m/s for 5 s. What is the…
A: Given that: Mass of the pail of water, m=3 kg Speed , v=2 m/s time taken, t= 5s
Q: Suppose a car travels 108 km at a speed of 20.0 m/s, and uses 2.10 gallons of gasoline. Only 30% of…
A: Given : d = 108 km = 108 x 103 m v = 20 m/s V = 2.10 gallons E = 1.30 x 108 J per gallon e = 30% =…
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 that, The distane d is 108 km speed of car is 30 m/s V is 2 gal Work done is 30 % Gasoline is…
Q: A 16.7 kg mass is thrown downward from a height of 18 m with a speed of 3.2 m/s. For the following…
A:
Q: A hiker of mass 49 kg is going to climb to the top of Mount Tam, which has elevation of 2574 ft. If…
A: Given values:Initial height:hi = 305 ft = 305(0.3048) m = 92.964 m Final height:hf = 2574 ft =…
Q: A car weighing 500 kg moving against a resistance of 500 N, accelerates from rest to 20 m/s in 100…
A:
Q: A box of weight 150kgf has gravitational potential energy stored in it equal to 14700J. Find the…
A: Given that,The gravitational potential energy (P.E)=14700 JThe gravitational weight of body…
Q: Cape energ burns Th Wh Ans Answer
A: Given Data The mass of the test rocket is:m=12.1 kg The kinetic energy of the rocket after the fuel…
Q: O. 14 : Work done in blowing a soap bubble of diameter 2 cm, is (S.T. = 3 x 10-² N/m) (a) 7.54 x 10…
A: To find-Work done (W)=?Given-Diameter of soap bubble D=2 cmRadius =D2=22=1 cmRadius(r)=1×10-2…
Q: A hydroelectric power facility (see figure) converts the gravitational potential energy of water…
A: The objective of the question is to find out what fraction of the energy of a 9 megaton fusion bomb…
Q: A 57 kg man runs up a flight stair having a rise of 4.5 m in 3.5 s. what average power must he…
A:
Q: A diesel engine pumps out 49 kg of water in one second. The water comes out vertically upwards with…
A:
Q: Q23.) A boy of mass 50 kg runs up a staircase of 45 steps in 9 s. If the height of each step is 15…
A: Given: m=50kg g=10m/s2 t=9s h=45*15 =675cm =6.75m
Q: HINT (a) How much net work (in J) is required for the cheetah reach its top speed? 28166 (b) One…
A: According to question--- Given data --- Mass m = 59 kg. Initial speed u = 0 m/sec. Final speed v =…
Q: A bird (m=250g) is flying through the sky at 10m/s, if the birds total energy is 1000J, what is his…
A: Given data: Mass (m) = 250 g = 0.250 kg Velocity (v) = 10 m/s Total Energy (TE) = 1000 J Required:…
Q: Mary's gravitational potential energy is 1870 J when she sits 2.20 m above the ground in a sky…
A: In this question, we have to find the Mary weight. Please give a positive rating if the answer helps…
Q: 102 kg man climbs a 3.2 meter high staircase at constant speed. How much work has he done? (=9.8 m/s…
A:
Q: Find the value of k in the network in Fig. P2.129 such that the power supplied by the 8-A source is…
A: Given Power supplied by 8A source is 106 W A1 = 8 AR1 = 2 ΩR2 = 4 ΩR3 = 6 ΩR4 = 3 ΩR5 = 10 Ω Find…
Q: A74.0 kg person climbs stairs, gaining 3.50 meters in height. Find the work done (in J) to…
A: Since you have asked multiple question, we will solve the first question for you. If you want any…
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: For exercise, an athlete lifts a barbell that weighs 400 N from the ground to a height of 2.20 m at…
A: Given data: Weight (mg) = 400 N Height (h) = 2.20 Time (t) = 1.60 s Required: The metabolic energy…
Q: For exercise, an athlete lifts a barbell that weighs 400 N from the ground to a height of 2.20 m at…
A: Weight force of the barbell, FW=400 N Displacement, d=2.20 m It is assumed that the efficiency of…
Q: An 85 kg mountaineer is reaching the top of Mt. Fuji that is 3.76 km high. The mountain makes a…
A: Given that, Mass of a mountaineer, m = 85 kg The mountaineer is reaching the top of Mt. Fuji that is…
Q: A car travelling at a speed of 60 km/h has a kinetic energy of 200 kJ. If the speed of the car is…
A: Given data The initial velocity of the car is given as u = 60 km/h. The initial kinetic energy of…
Q: For A= 5î + 3j - 5k, B = -4î + 4ĵ + 2k, and C = 5j – 5k, find C. (A - B).
A: The given vectors, A→=5i^+3j^-5k^B→=-4i^+4j^+2k^C→=0i^+5j^-5k^
Q: A 75 kg sprinter accelerates from 0 to 8.0 m/s in 5.0 s. What is the metabolic energy, in kJ…
A: From work energy formula we know, Metabolic energy = change of K.E…
Q: A 95 kg man runs up a 20 m high stairs at a constant speed. If it takes him 8 seconds to reach the…
A: Given The mass of the man is m=95 kg. The height of the stairs is h=20 m. The time is taken by the…
Q 23.) A boy of mass 50 kg runs up a staircase of 45 steps in 9 s. If the height of each step is 15 cm, find his power. Take g=10ms−2.
Step by step
Solved in 2 steps with 1 images