A pole-vaulter just clears the bar at 5.59 m and falls back to the ground. The change in the vaulter's potential energy during the fall is -3900 J. What is his weight? Number i Units
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A: Givenm=8 kgθ=53°μk=0.4
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Q: ▼ Part A How much work must you do to push a 10.0 kg block of steel across a steel table (μ = 0.60)…
A: Mass of block m = 10 kg speed of block V = 1.0m/s time taken t = 3.40s uk = 0.60
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A: Mass(m) = 5 kg Height(h) = 10 m Potential energy (E) = mgh g = gravitational acceleration g = 9.8…
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A: Solution: Given: m = mass of box = 0.6 kg g = gravitational acceleration = 10 m/s2 h = height of…
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A: Given data: Mass m =2 kg Velocity v=8 m/s2. Final Kinetic energy =268 J
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A: Since we only answer up to 3 sub-parts, we’ll answer the first 3. Please resubmit the question and…
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A: Given: The applied force is 50 N. The angle of the force is 20o with the horizontal. The…
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Q: A 2.00-kg (20.0-N) stone is dropped from a height of 5.0 m, and strikes the ground with a velocity…
A: Weight of stone (w) = 20 N Mass of stone (m) = 2 kg Initial height (h) = 5 m Velocity with which the…
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Q: A 5.5 kg bird is flying 12 m above the ground. What is the Potential energy of the bird is…
A: Mass of bird (m) = 5.5 kg Height of bird above ground (h) = 12 m g = 9.8 ms2
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A: Given mass of box A=mA=12kg mass of box B=mB=5kg.
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Q: A ball of mass 100 g, is dropped from a height of 22 m and moving vertically down. Ignoring the air…
A: Solution: Given: m = mass of ball = 100 g = 0.100 kg g = gravitational acceleration = 9.81 m/s2 h1 =…
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A: Given, mass of the bird m = 5.5 Kg Height on which bird flying h = 12 m We know the expression for…
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A: This can be solved using the work-energy theorem. As per the work-energy theorem net work done on an…
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Q: A force is acting on a 2.00 kg particle whose position changes with time as x = 4.0 t² - (1/3) t³,…
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- For its size, the common flea is one of the most accomplished jumpers in the animal world. A 2.10-mmmm-long, 0.470 mgmg flea can reach a height of 20.0 cmcm in a single leap. Part A Ignoring air drag, what is the takeoff speed of such a flea? Express your answer in meters per second. Part B Calculate the kinetic energy of this flea at takeoff. Express your answer in joules. Part C Calculate the kinetic energy per kilogram of mass. Express your answer in joules per kilogram. If a 77.0 kgkg, 2.00-mm-tall human could jump to the same height compared with his length as the flea jumps compared with its length, how high could the human jump? Express your answer in meters. If a 77.0 kgkg, 2.00-mm-tall human could jump to the same height compared with his length as the flea jumps compared with its length, what takeoff speed would the person need? Express your answer in meters per second. Most humans can jump no more than 60.0 cmcm from a crouched…Do not use Ug=mgh. PleaseA bicycler is moving at 8m/s when they reach the top of a 20m high hill. They coast 15m to the bottom of the hill. They are moving 15m/s when they reach the bottom of the hill. The combined mass of the bicycler and the bicycle is 95kg. a. Calculate the work done by friction on the bicycler. b.Calculate the magnitude of the force of friction acting on the bicycle.
- a. Calculate the work done (in J) on a 1550 kg elevator car by its cable to lift it 39.5 m at constant speed, assuming friction averages 135 N. b. What is the work done (in J) on the lift by the gravitational force in this process? c. What is the total work done (in J) on the lift?A 101-kg man is skiing across level ground at a speed of 9.5 m/s when he comes to the small slope 1.8 m higher than ground level shown in the following figure. a. If the skier coasts up the hill, what is his speed when he reaches the top plateau? Assume friction between the snow and skis is negligible. b. What is his speed when he reaches the upper level if an 80-N frictional force acts on the skis?X Problem 1. An NFL punter punts a 0.02 kg football 100 meters into the air. A. What is the initial potential energy of the ball when it's at its peak? 0.02 x 9.8 x 100 = 19.6 j What is its final kinetic energy before it hits the ground? 1 o add speaker notes B. C. What is the velocity of the ball before it hits the ground? در نگاه U EVA
- A 700 kgkg elevator accelerates upward at 1.4 m/s2m/s2 for 14 mm, starting from rest. A. How much work does gravity do on the elevator? Express your answer with the appropriate units. B. How much work does the tension in the elevator cable do on the elevator? Express your answer with the appropriate units. C.What is the elevator's kinetic energy after traveling 14 mm? Express your answer with the appropriate units.c) Figure 1 shows a small cart of mass 5 kg moving on the frictionless track with a speed of 10 ms¹ along AB, down to C, and climbing up to D and E. Calculate: i. ii. iii. A 10 m s B 5 m 2 m Figure 1 The kinetic energy of the cart as it moves along AB. The speed of the cart at point C. The kinetic energy of the cart as it moves along DE. D EA. Calculate the work done by the force of gravity when a 5.0kg object is lifted to a height of 30.0m above the ground B. Calculate the velocity with which the object strikes the ground if dropped from that height, using the principle of conservation of energy C. Calculate the kinetic energy and the potential energy of the object at a halfway on the path after it is dropped. To do this part, you need to find the velocity of the object at that position using an equation of motion. What is the total energy of the object at that point? Does this verify the principle of conservation of energy?
- In the Figure below, we see a 500 gram block resting on the horizontal portion of a "track", whose left end is curved upwards. The horizontal portion of the track is frictionless, except for a 50.0 cm long “rough" portion, shown in the Figure, where the coefficient of kinetic friction is 0.300. The curved portion of the track is frictionless. The block is held against a spring (which has a stiffness constant of 500 N/m), compressing the spring by 10.0 cm. Then the block is released from rest. (NOTE: The block is not attached to the spring; it is just held against the end of the spring.) For simplicity, assume that g = 9.80 m/2. 50.0 cmA 150 g baseball is thrown straight up. If it is released at a height of 1.0 m above the ground with a kinetic energy of 2.4 J, what is its height above the ground when its kinetic is 1.2 J? ccA box of mass 4.0 kg hangs by a cable from the ceiling of an elevator. The elevator is moving up at a steady speed of 5.0 m/s for 8.0 m. Use g = 10 m/s2. Match the answers with questions. the final kinetic energy of the box (Kf) the change in kinetic energy of the box (ΔK) A. 320 J B. 20 J C. -320 J D. -20 J E. 50 J F. -50 J G. 0 J