The work done by the external forces on a system equals the change in (a) total energy (c) potential energy (b) kinetic energy (d) none of these. forgos (external and internal) 11 th

Q: A box with a mass of 3.0 kg is accelerated from rest by a constant force across a floor at a rate of…

A: A box with a mass m = 3.0 kg is accelerated from rest (intial velocity u = 0) by a constant force F…

Q: (d) Explain what is meant by the following terms: O Kinetic Energy E) () Potential Energy (PE) ()…

A: The ability to work is defined as energy. The capacity of a body to accomplish work can be…

Q: A superman cyclist rode a bike uphill at 20 miles/hour for two hours. To sustain this constant speed…

A:

Q: How much work is done by gravity when dead lifting a 100.0 kg barbell 92.78 cm from the floor to hip…

A: Dear student The work done is defined as force × displacement in the direction of force. W = F S…

Q: Figure (a) applies to the spring in a cork gun (Figure (b)); it shows the spring force as a function…

A: As per guidelines i have solved the first question.

Q: The work (J) done by the balloon in its ascent * 7-9 A balloon lifts its 2.0 x 102 kg load at a…

A: T=10min height = 1500m

Q: - A weight-lifter does 4.4 x 10³ J of work in raising a weight from the floor to a height of 2.0…

A: Given  Work (w) = 4.4 × 103 J  Height (h) = 2 m  (a) let average force is ' F ' .   w = F× h…

Q: A particle of mass 200g is thrown vertically upwards with a speed of 10ms-1, the work done by force…

A: Given: mass = 200 g v = 10 m/s

Q: A force of 190 Nt is used to lift an 18 kg mass from the ground to a helgh 22 m. Assume no friction.…

A: It is given that, F=190 Nm=18 kgh=22 m

Q: A crate of mass 10 Kg is pulled up a rough incline with an initial speed of 1.5 m/s. The pulling…

A: The expression for work done is,

Q: A 53.2-kg skateboarder starts out with a speed of 2.33 m/s. He does 85.8 J of work on himself by…

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Q: The work done on an object moving parallel to the force acting on it is: O OJ O at maximum O…

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Q: A force of 80N [left] is applied to a desk making it slide 12 m [left] across the floor. How much…

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Q: What is the total work done by a 75kg man who pushes a box 7m up a ramp that makes an angle of 16o…

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Q: It takes 180 J of work to compress a certain spring 0.15 m. (a) What is the force constant of this…

A: (force constant is also known as spring constant)

Q: Consider a 55kg box being pushed with a 200N horizontal force acros The box accelerates at 2m/sec.…

A: Givenm=55 kgF=200 Nd=10 ma=2 m/s2

Q: 3. A certain force applied on an object is depicted below. (a) What is the work done by the force…

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Q: A 4 kg crate sitting on a horizontal surface is pushed 30 m by a force of 6N applied at an angle of…

A: Given- Distance covered by crate (S) = 30 m Applied force (F) = 6 N Force appled at an angle (θ) =…

Q: Suppose the car approches a hill and has the intial speed 106 km/h at the bottom of the hill. The…

A: Given Data : The initial speed of the car at the bottom of the hill is given as u=106 ms

Q: (a) Calculate the work done (in J) on a 1200 kg elevator car by its cable to lift it 38.0 m at…

A:

Q: A boy pulls a 15-lb sled 50 ft along a horizontal surface at a constant speed. What work does he do…

A: Given data: Mass of sled is, m=15 lb=15×0.45=6.75 kg. Distance travelled by sled is, s=50…

Q: A box is pulled with a force of 40 N to produce a displacement of 7 m. If the angle between the…

A: as per our guidelines we are supposed to answer only one question. Kindly repost other questions as…

Q: Determine the work (in Joules) done if the force of friction is 20 N and the applied force of the…

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Q: The net work done on a certain object is zero. What can you sayabout its speed?

A: Net work done is zero

Q: If the total work done on an object is positive, O none of the above O its kinetic energy will…

A: We know that, Work done(W) = change of K.E                           = (K.E)f - (K.E)i

Q: A force of 11.48 Newtons was exerted by a spring to restore its original length from 124-cm to…

A: Force exerted by the spring is F=11.48 N Change in the length of the spring is x=(124-15) cm=109…

Q: hen an archer pulls an arrow back in his bow, he is storing potential energy in the stretched bow.…

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Q: A force of 13.81 Newtons was exerted by a spring to restore its original length from 109-cm to…

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Q: How can we ignore the self-potential energy when doing a work-energy problem or an…

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Q: A sleigh sliding on a stiff icy mountainside obeys the law of conservation of Mechanical energy.…

A: The sleigh is initially at rest at the top of the 1 km high mountain peak. Since the sleigh is at…

Q: Calculate the work done (in J) by an 80.0 kg man who pushes a crate 4.15 m up along a ramp that…

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Q: (a) What is the efficiency of an out-of-condition professor who does 2.30 ✕ 105 J of useful work…

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Q: A 4 kg crate sitting on a horizontal surface is pushed 30 m by a force of 6N applied at an angle of…

A:

Q: A force of: F = (23i+16j-51K)N is applied to a particle of mass 15-kg. The particle has a speed of…

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Q: A force of 19.91 Newtons was exerted by a spring to restore its original length from 87-cm to 14-cm.…

A:

Q: A 2500J of work was done on a 10kg body.if the body was moved 20.0m along horizontal and if…

A: Given value--- work done = 2500 J. mass = 10 kg. displacement = 20 m. coefficient of friction force…