A 35-kg box initially at rest slid down a frictionless arc from a height of 12 m. What is the total change in kinetic energy of the box? Express the answer in Joules.
Q: A 80 kg student traveling in a car with a constant velocity has a kinetic energy of 1.1* 10^4j.…
A:
Q: Sam’s job at the amusement park is to slow down and bring to a stop the boats in the log ride. If a…
A:
Q: The first car has twice the mass of a second car, but only half as much kinetic energy. When both…
A: Let , The first car mass = m1 second car mass = m2 Kinetic energy of 1st car = K1 Kinetic energy of…
Q: A 70-kg secret agent skies down a circular hill (radius 15 m) and grabs a 20 kg bag, then flies…
A: Given information: The mass of the agent (M) = 70 kg The radius of the circular hill (R) = 15 m The…
Q: A 4.3-kg ball is thrown from the top of a 10-m tall building (point A) with a speed of 6 m/s at an…
A: When the ball is at maximum height, the total energy as K.E. is zero ( that's when it is at a 10 m).…
Q: Consider a situation where you carry a 20-N box up a flight of stairs, raising its elevation by 5 m.…
A: Write the given values with the suitable variables. W=20 Nh=5 m Here, W is the weight of the box and…
Q: Vo
A:
Q: A 9.50-g bullet has a speed of 1.30 km/s, (a) What is the kinetic energy in joules? (b) What is…
A: mass of bullet (m) = 9.50 gm or 9.5010-3 Kgspeed of bullet (v) = 1.30 km/s or 1.30103…
Q: A block is sliding along a horizontal surface with 100 J of kinetic energy. The kinetic frictional…
A: Given: kinetic energy k = 100 Jblocks stops in t = 5 s
Q: A baseball has a mass of 0.145 kg. In batting practice a batter hits a ball that is sitting at rest…
A: Part-I: Given: The mass of the baseball is 0.145 kg. The initial speed of the ball is 0 m/s. The…
Q: Two sledders go down a steep hill for which friction is negligible on identical sleds. Sledder A has…
A: Mass of sledder A = 50 kg Mass of sledder B = 75 kg
Q: A ball of mass 2.12 kg is tied to a string of length 4.15 m as shown in Figure P6.50. The ball is…
A:
Q: Suppose an elephant has a mass of 3050 kg. How fast in meters per second does the elephant need to…
A:
Q: A box is initially sliding across a frictionless floor with a constant speed of 2.5 m/s. Then, the…
A: According to the work energy theorem, Work done by the friction = change in kinetic energy
Q: At what speed does a 1900 kg compact car have the same kinetic energy as a 20000 kg truck going 24…
A:
Q: During terrible weather at a ski-flying world championship, a ski jumper tried to adjust for bad…
A: Mass of ski jumper, m=73kg Drop in height, h=45m
Q: A bowling ball with mass of 3.93.9 kg falls off a shelf 4.64.6 m above the ground. Assuming a…
A: mass of ball (m) = 3.93 kg height (h) = 4.64 m
Q: A baseball pitcher sends a fastball toward the batter with a speed of 40 m/s. The batter swings and…
A: Given:- The mass of the ball is m = 145 g The speed of the ball is v = 40 m/s The distance that…
Q: A 75 kg person, originally at rest, sleds down a 50 m tall hill and comes to a stop. How much work…
A: Given Mass of person is m= 75 kg Height of hill is h= 50 m Acceleration due to gravity is g= 9.80…
Q: Construct Your Own Problem - Consider humans generating electricity by pedaling a device similar to…
A:
Q: If a 70 kg baseball player steals home by sliding into the plate with an initial speed of 10 m/s…
A: mass of player, m = 70 kg initial speed, u = 10 m/s final speed, v = 0 m/s
Q: what speed does a 1100 kg compact car have the same kinetic energy as a 20000 kg truck going 21 km/h…
A:
Q: A 500-kg dragster accelerates from rest to a final speed of 110 m/s in 400 m (about a quarter of a…
A: The problem is based on the concept of power. Power is the rate of doing work. To solve this, we…
Q: Problem 1: A skier of mass 70 kg if pulled up a slope by a motor-driven cable. (a) How much work is…
A:
Q: A 1000kg car moving at 22.8 m/s on a flat road slams on the brakes and skids to a stop. The…
A: Mass of the car (m) = 1000 kgInitial velocity (v) = 22.8 m/sCoefficient of kinetic friction () =…
Q: Q1. Carol, a circus performer, is on a swing. She jumps off the swing and lands in a safety net.…
A:
Q: 4. An Olympic weightlifter snatches 100kg. In a snatch, the barbell is moved from a stationary…
A:
Q: At what speed does a 1200 kg compact car have the same kinetic energy as a 17000 kg truck going 23…
A: Given: The mass of the car is 1200 kg. The mass of the truck is 17000 kg. The speed of the truck is…
Q: A 68.5-kg athlete leaps straight up into the air from a trampoline with an initial speed of 8.7 m/s.…
A:
Q: The velocity of a 1.6kg particle changes from 3i-6j m/s to -6i+3j m/s. What is the change in kinetic…
A:
Step by step
Solved in 3 steps with 2 images
- Same set-up for the conservation of energy was performed. The 5-g marble covered a horizontal distance of 40 cm from the edge of the ramp (horizontal) from an elevation of 15 cm above the ground. At what height (in cm) relative to edge of the ramp was the marble released? Use g=9.8 m/s2. Round off your answer to two decimal places.A 5.0-kg block that initially has a speed of 6.0 m/s is moving in a straight line on a level surface where there is kinetic friction between the block and the surface. What is the magnitude of the work done by the frictional force after the block comes to rest?Releasing some frustration at the end of the semester, you throw your physics book (mass of 2.7 kg) off of a 25 m tall building. You throw your book so that it has a speed of 6 m/s right after you let go. What is the kinetic energy of your book after you let go? (in J) 16.2 130. 0 48.6 662 How how fast is your textbook moving right before it lands? For now, ignore friction. (in m/s) 28.1 22.9 21.3 16.7
- An object with a mass of 12.5 kg is moving along a rough horizontal surface. At a certain point it has 66 J of kinetic energy. If the coefficient of friction between the object and the surface is 0.44, how far will the object go beyond that point before coming to a stop? Express your answer in meters, to at least one digit after the decimal point. plz help and use g = 9.8A 9.55 kg object is initially traveling at 24.8 m/s. During the next 185 seconds – 263 J of total work is done on the object. What is the speed of the object at the end of the 185 seconds?A 65 kg student traveling in a car with a constant velocity has a kinetic energy of 1.9 104 J. What is the speedometer reading of the car in km/h?
- Maria sets up a simple track for her toy block (m = 0.30 kg) as shown in the figure below. She holds the block at the top of the track, 0.54 m above the bottom, and releases it from rest. (a) Neglecting friction, what is the speed of the block when it reaches the bottom of the curve (the beginning of the horizontal section of track)? m/s(b) If friction is present on the horizontal section of track and the block comes to a stop after traveling 0.80 m along the bottom, what is the magnitude of the friction force acting on the block? NA block of mass m1=2.40kg is connected to a second block of mass m2=1.80kg. The two masses start from rest and are moving with a speed of 2.05m/s just before m2 hits the floor.If the coefficient of kinetic friction is μk=0.350, what is the distance of travel, d, for the masses?How much conservative work was done on this system?How much nonconservative work was done on this system?How fast would a 30-kg kid need to run in order to have the same kinetic energy as an 8.0-g bullet fired at 400 m/s, in m/s? Your answer needs to have 2 significant figures, including the negative sign in your answer if needed. Do not include the positive sign if the answer is positive. No unit is needed in your answer, it is already given in the question statement.
- A pendulum with a light string and a mass attached to it. As the pendulum swings downward. What is the work done by the strings tension on the mass (+, - or 0) and why?A mechanic pushes a m=2300 kg car from rest. He does W=4850 J of work in the process. During this time the car moves d327 m. Neglect the friction to answer the following questions. What is the horizontal force exerted on the car? Units: What is the velocity of the car at the final distance? Units:A 69.0-kg athlete leaps straight up into the air from a trampoline with an initial speed of 8.9 m/s. The goal of this problem is to find the maximum height she attains and her speed at half maximum height. Write the general equation for energy conservation and solve for the velocity at half the maximum height. Substitute and obtain a numerical answer.