d. ma 350 5m 2. A runner weighs 500 N. Initially his speed is 5 m/s. a. If he does 30 J of work, what is his final speed? b. By how much would the runner accelerate in 7 seconds? c. How much is the power produced by his work?
Q: How much work do the breaks on a 3200 kg car need to do in order to slow it from 30 m/s to 20 m/s?
A: Given mass m=3200Kg V1=30m/s V2 = 20m/s According to work energy theorem work done by the car is…
Q: 4. A driver initially at rest accelerates her 1500 kg car to a final velocity of 30 m/s. a. What is…
A:
Q: A 25 kg box sliding to the left across a horizontal surface is brought to a halt in a distance of 25…
A:
Q: A gunfighter in a western movie fired a 3.0-gram bullet at 400m/s towards a hanging wooden sign that…
A: The objective of this question is to find out the work done by the sign in slowing the bullet and…
Q: 10. A person jumped into the ocean from a car which was 320 m above the water's surface. He had a…
A: Given: mass of person, m = 94 kg Initial height of person, h1 = 320 m final height, h2 = 75 m
Q: How much work is needed to change the speed of a 2375 kg sport utility vehicle from 15.0 m/s to 60…
A: Given data: Mass (m) = 2375 kg Initial velocity (Vi ) = 15.0 m/s Final velocity (Vf) = 60 m/s…
Q: A 100 kg crate slides 10.0 m down a 40 degree incline. The coefficient of friction is 0.20. What is…
A:
Q: A shopper pushes a grocery cart for a distance 18.5 m at constant speed on level ground, against a…
A: Since there are multiple sub-parts posted, we will answer the first three sub-parts for you. If you…
Q: 1. A 6.2kg box is moving at 2.4m/s to the left. a) What is its kinetic energy? 2.4m/s 6.2kg b) How…
A: Given data: Mass (m) = 6.2 kg Initial velocity (u) = 2.4 m/s Work done by the friction (W) = -4 J…
Q: Bob can throw a 334 g rock with a speed of 28.49 m/s. He moves his hand forward 0.91 m while doing…
A:
Q: The kinetic energy of a 3.0 kg object moving at a speed of 9.3 m/s would be: a. 130 J b. 260 J…
A:
Q: In the attached image, T1 = 24.0 N, and T2 = 16.0 N act on a block of mass 2.00 kg. The surface has…
A: Given:Tension T1 = 24 NTension T2 = 16 NDisplacement = 7 m
Q: An accelerating object of mass m=18 kg is fired with an initial speed v=9 m/s at a starting point.…
A:
Q: A box is being pushed to the right with 112N of force. The box travels a total of 1.5m to the right.…
A:
Q: 17. A child (mc=26.1 kg) on a bicycle (mb=11.2 kg) goes down a hill as shown. 7.6 m 5.6 m He starts…
A:
Q: A 0.30 kg soccer ball is released from the top of a 10 m building. The ball strikes the ground with…
A: The velocity of a ball freely dropped from a height is given by v = 2gH, where g = acceleration due…
Q: a. How much work does an elevator motor do to lift a 1000 kg elevator a height of 100 m at a…
A:
Q: A machine does 2500 J of work in 1 min. What is the power developed by the machine? A. 21 W B. 42 W…
A: Solution 1 Given that :- Work done W = 2500 J Time t = 1 min = 60 sec The power P can be written as…
Q: A. Suppose you lift a 15 kg box by a height of 1.0 m. How much work do you do in lifting the box?…
A: (a) The work done in lifting the box is
Q: An accelerating object of mass m=5 kg is fired with an initial speed v;=9 m/s at a starting point.…
A:
Q: There is a 23.1 kg box that starts with an initial velocity of 23.5 m/s. The box moves up a hill…
A:
Q: A woman is rollerblading through a park. If she starts from rest, and then reaches a kinetic energy…
A: Since the woman is starting from rest, her initial kinetic energy will be zero. Final kinetic energy…
Q: A puck, mass 0.20 kg, slides on a horizontal ice rink with a speed of (1.47x10^0) m/s. A hockey…
A: This can be solved using the work-energy theorem. As per the work-energy theorem net work done on an…
Q: 2. A hand gun fires a 7.50g bullet at a speed of 377m/s. A. Calculate the bullet's kinetic energy.…
A:
Q: A hollow block of mass 3 kg is lifted to a height of 10 m in 3 minutes. a. What is the work done in…
A:
Q: A 5.00 gram bullet moving horizontally with a speed of 400 m/s collides with a wooden block. After…
A:
Q: 10. A machine is used to move a 700 N object by 2.00 m by exerting 400 N of force through a distance…
A:
Q: What is the minimum amount of work needed to lift a 3 kg box 2 meters? a. 60 J b. 5 J c. 15 J d. 120…
A: Mass, m = 3 kgHeight, h = 2 mWork done, W = ?
Q: How much work is done when a 4kg block of ice is moved from rest to a speed of 5m/s? A. 50 J…
A:
Q: meters. The angle betwe
A:
Q: 1400 kg Polo STi accelerates from rest to 20 m/s in exactly 2 seconds. a. Calculate the change in…
A: Given,Mass of the car, m = 1400 kgcar is start from rest to 20 m/s in exactly 2 sec.hence, the…
Q: 45. A 20 kg crate slides down a 10 m high 30 degree incline with a frictional coefficient of .100.…
A:
Q: Q1. A force of 7N as on an object. The displacement is, say 8 m, in the direction of the force. Let…
A:
Q: . What type of energy does he have at the top of the hill? b. What is his potential energy? c.…
A: The basic concepts used to solve this question are The kinetic energy of an object is the energy…
Q: I need help with these questions
A: 1) mechanical energy is always conserved with certain conditions. Mechanical energy is combination…
Q: Dr. B is bouncing a 0.245 kg playground ball in his office one day. He drops the ball from a height…
A:
Q: pusnes a 3 Kg block along table from point A to point C as showr in the figure below been prepared…
A: Disclaimer: Since you have posted a question with multiple sub-parts, we will solve the first three…
Q: A 101-kg man is skiing across level ground at a speed of 9.5 m/s when he comes to the small slope…
A:
Q: man pulls a 25 kg box in a horizontal fashion with 60N of force over a surface with us = 0.15 nd μk…
A:
Q: A. A student whose mass is 51 kg climbed the stairs from the first floor to the third floor, 15…
A: Answer:- Given Mass of a student (m) = 51 kg Height of first floor to the third floor (h) = 15 m…
Step by step
Solved in 2 steps with 2 images