24. If the time required for a student to swim 500. meters is doubled, the power developed by the student will be (1) halved (2) doubled (3) quartered (4) quadrupled

Q: A girl of mass 35 kg climbs up the stairs and reaches the roof at a height 6 m in 3 sec. g= 10 m/s²…

A: Given in question: Mass of the girl(m) = 35 Kg                                 Height of the roof(H)…

Q: A transport truck driving at a constant speed of 84.6 km/hr on a flat stretch of highway must…

A:

Q: At full power, how long for the car to accelerate 0-64.0mph? Neglecting friction and air resistance

A: Use the expression for the power, apply work-energy theorem, and solve for the power provided by the…

Q: Determine the power a hiker of mass- 60 kg must have to carry up a 20 kg backpack up a hill of…

A: The work required to carry an object to h height can be determined as, Here, m, g and h represent…

Q: Q31. If a ball falls from a height h then the sum of its kinetic and potential energy after it falls…

A: Let the mass = m  Let the height from which mass is dropped = h

Q: 2. A baby carriage is sitting at the top of a hill that is 21 m high. The carriage with the baby…

A: Given that  h=height of hill= 21m total weight =12 Kg carriage has total energy=? at a height…

Q: How long will it take a 742-kg car with a useful power output of 43.2 hp (1 hp equals 746 W) to…

A: Mass of car (M) = 742 kg  Output power of car = 43.2 hp  Power (P) = 43.2(746W) = 32227.2 W  Speed…

Q: Compare the work required to accelerate a car of mass 2000 kg from 30.0 to 40.0 km/h with that…

A: According to the work energy theorem,

Q: A boy reaches out of a window and tosses a ball straight up with a speed of 10 m/s. The ball is 20 m…

A: Given:             A ball straight up with a speed of 10 m/s             The ball is 20 m above the…

Q: A car of mass 1500 kg is initially travelling at a speed of 12 m/s. The driver then accelerates to a…

A: Mass of the car,  Initial speed of the car,  Final speed of the car,  Distance traveled,

Q: A 67 kg student traveling in a car with a constant velocity has a kinetic energy of 1.8 x 10^4 J…

A:

Q: How long will it take a 921-kg car with a useful power output of 57.6 hp (1 hp equals 746 W) to…

A:

Q: 1 kg object is dropped from a height of 100m. After falling 10 m, how much kinetic energy does it…

A:

Q: "Tarzan, who weighs 650N, swings from a cliff at the end of a vine 24 m long. From the top of the…

A: The weighs =650N  To find does the vine brake

Q: A car of mass 1.5 x 10' kg is initially travelling at a speed of 11 m/s. The driver then accelerates…

A:

Q: What is the gravitational potential energy of a child of mass of 30 kg that is playing in a 300 m…

A: Given Initially Mass of a child = m = 30 kg Height of building= 300 m Potential energy = 88200 J…

Q: 33.6-kg child starting from rest slides down a water slide with a vertical height of 14.0 m.…

A:

Q: 1). what is the speed of a 14 kN body at rest then falling from a height of 238 m.

A: As per guidelines only first question is solved here. 14 kN body at rest Height, h = 238 m

Q: Determine the power performed by a 70-kg man up the stairs with a height of 3.5 meters in 10…

A:

Q: A transport truck driving at a constant speed of 87 km/hr on a flat stretch of highway must produce…

A:

Q: The engine in an imaginary sports car can provide constant power to the wheels over a range of…

A: u=0 mphv=30 mph=30×1609.343600=13.4 m/sv'=60 mph=2×v=26.8 m/st1=1.20 st2=?

Q: Determine the mass of a person climbing a tree 5 meters high in 9 seconds with power of 450 Joule

A:

Q: A car with the mass 1500 kg accelerated from rest to a speed of 30 m/sec in a time 10 sec. what is…

A: Given that  mass m 1500 kg Initial velocity u 0 m/sec final velocity v 30 m/sec time t 10 second…

Q: Calculate the power output in watts and horsepower of a shot-putter who takes 1.10 s to accelerate…

A:

Q: The engine in an imaginary sports car can provide constant power to the wheels over a range of…

A: In the first case at constant power, the power is: P1=0.5mv12tP1=0.5m7021.20 In the second case at…

Q: If a ball is thrown from a height of 30m at a speed of 8 m/s, what is the speed of the ball when it…

A: Given : Height h=30 mInitial velocity u= 8 m/sAcceleration g= 10 m/s2Final velocity v=? Apply…

Q: 2. A 6.0 kg mass is thrown vertically upward with an initial speed of 10.5 meters per second. What…

A:

Q: Calculate the power required of a car of mass, m = 1,400 kg. When climbs a hill with θ = 10° at…

A:

Q: Resistance to the motion of an automobile consists of road friction, which is almost independent of…

A:

Q: 1. How much power is required when using a 12 N force to push an object at a velocity of 3 m/s?

A: Given data :  Force "F"= 12N  Velocity "v"= 3m/s

Q: What happens to the kinetic energy of an object If its speed is doubled

A: Kinetic energy is given by12mv2 Where m=mass of object, v=velocity of the body. Kinetic energy will…

Q: How long will it take a 816-kg car with a useful power output of 47.2 hp (1 hp equals 746 W) to…

A: Given data: Mass (m) = 816 kg Power output (P) = 47.2 hp 1 hp = 746 W Speed (v) = 19.6 m/s Air…

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: The resistance to the motion on the automobile depends on road friction, which is almost independent…

A:

Q: 1.2Compute the number of watts which is equivalent to 15 horsepower using the following equivalents.…

A: Power (P) = 15 horsepower To convert : The given power into units of WATTS

Q: 60. A cart of mass m traveling at speed v has energy KE. If the mass of the cart is doubled and the…

A: The given data   The mass of the cart  is m The velocity is v

Q: A car with the mass 1500 kg accelerated from rest to a speed of 30 m/sec in a time 10 sec. what is…

A: Given, mass of the car = 1500kg Initial velocity = u =0 m/s Final velocity = v = 30 m/sec Time = t =…

Q: When the speed of an object is quadrupled, its kinetic energy is    A. doubled   B. increased by…

A: Given: The speed of the object becomes quadrupled.

Q: A weight lifter raises a 80 kg barbell to a height of 2.4 m. what is the barbell's potential energy?…

A: Potential energy = mgh g=9.81 m/s^2 h=2.4 m m=80 kg

Q: What is the power demonstrated by a weightlifter when lifting a 420 kg barbell 1.4 meters in 0.65…

A:

Q: 10 An object falls freely from rest near the surface of Earth. What is the speed of the object when…

A: Write the kinematic expression for final velocity

Q: If the speed of an object is tripled, what happens with its kinetic energy? Explain

A: If the speed of an object is tripled then we have to find what happens with its kinetic energy?

Q: 33 - Which or which of the following is true about kinetic energy? I) Kinetic energy is a type of…

A: Let us assume that an object has a mass = m Let the speed of the object at any instant = v Let…

Q: an aircraft carrier was sent out to the south china sea to heigten the tensions between the disputed…

A: Using relation for power and force that is  power = force * velocity

Q: Can a centripetal force ever do work on an object? Yes No

A:

Q: The fastball of a famous pitcher in the National League has been clocked in excess of 95 mph.…

A: Velocity,(v)=95 mph=95 x 0.445 m/sec=42.27 m/sec -----(1) [Given]   [Using 1 mph=0.445 m/sec] Mass…

Q: A force of 5 pounds is required to hold a spring stretched 0.2 feet beyond its natural length. How…

A:

Q: ) Determine the kinetic energy required to accelerate a 900 kg car shown in the Figure from rest to…

A: