A track has three hills. A-18m, B=10m, C=5m. Mass of the ball=2kg. The ball descends down the first hill and reaches the bottom (closed system) A. What is the speed of the ball at the bottom of hill A? B. The continues up hill B. What is the speed at the top of the hill B C. The ball continues to roll up hill C. What is the ball speed at the top of the hill C? D. What will be the answer to (a) if a 4kg ball is used? Why?

Q: 2) A rollercoaster cart starts at rest from a height of 60m above the ground before traveling…

A: Given: A rollercoaster cart starts at rest from a height, h = 60m above the ground before traveling…

Q: Q2/ An object of mass 15 kg is moving with a uniform velocity of 4 ms. What is the kinetic energy…

A: Given data:  Mass (m) = 15 kg Velocity (v) = 4 m/s Required: Kinetic Energy (KE)

Q: A 9.50 g bullet has a speed of 1.26 km/s. (a) What is its kinetic energy in joules?  ________ kJ…

A: The kinetic energy of the bullet is KE=12mv2=129.50×10-3 kg1.26×103 m/s2=7541.1J≈7.54kJ

Q: A bicycle and rider going 15 m/s approach a hill. Their total mass is 91 kg. (a) What is their…

A: Given, Mass,m=91 kg Speed,v=15 m/s

Q: 4 A block with a mass of m = 7.4kg block starts at rest 1.2m above the ground, at the top of a…

A: Given Information:- Mass of the block is m=7.4 kg Initial speed of the block is vi=0 Initial height…

Q: You (60kg) and a friend (75 kg) are each in a sled sitting at the top of a snowy hill. You waxed…

A: Given :      Mass of me ,m1 = 60 kg      Mass of a friend, m2 = 75 kg      Height of the hill, h = 8…

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: A student builds a roller coaster as shown. The heights of the points are A= 4 m B= 0.8 m C= 0 m.…

A:

Q: 1. An automobile with a mass of 1200 kg travels at a speed of 90 km/h. a) What is its kinetic…

A: QUESTION 1 SOLUTION: PART (a) solution: concept used:

Q: Jeric, a professional rooftop futbol player, kicked a 4.0 kg ball off a rooftop that is 50 m off the…

A: Motion perpendicular are independent of each other. Motion can be uniform or accelerated. The…

Q: eric, a professional rooftop futbol player, kicked a 0.450 [kg] ball off a rooftop that is 81.0 [m]…

A: (A) Let us represent Jeric by J1 and Joshua by J2. Let the point of kicking of ball by J1 be the…

Q: An object moves along the x axis, subject to the potential energy shown in the figure. (Figure 1)…

A: Givenm=3.0 kg

Q: 1. A cart of mass 2.4 kg rolls without friction on the track shown. At point A the cart is moving at…

A: a) by mechanical energy conservation  Kf + Uf = Ki + Ui  (1/2)mvb2 + mg(1.7) = (1/2)m×72 + mg(0.3)…

Q: Maria sets up a simple track for her toy block (m = 0.26 kg) as shown in the figure below. She holds…

A:

Q: (Figure 1) is the potential-energy diagram for a 500 g particle that is released from rest at A.…

A:

Q: 1. A 10 kg at a mail facility slides down a 10 meter sorting chute. The height of the chute is 2…

A: As per guidelines we are suppose to do only 3 subpart from multipart question. Please post the rest…

Q: Jeric, a professional rooftop futbol player, kicked a 4.0 kg ball off a rooftop that is 50 m off the…

A: To find the speed of the ball just before it reaches joshua And To find the speed of the ball before…

Q: . A 0.10-kg steel ball drops to the floor from a height of 2.0 m and then rebounds to a height of…

A:

Q: A charging bull elephant with a mass of 5400 kg comes directly toward you with a speed of 4.00 m/s.…

A: If the net external force acting on a system is zero then the total momentum of the system remains…

Q: A sledder with a total mass 40.0 kg (including the sled) slides down a 10.0m hill that is 20◦ from…

A: i. Kinetic energy of the sledder at the bottom of hill Ek=12mv2=12(40.0 kg)5.5 m/s2=605 J

Q: A roller-coaster at its highest point is 100m high. The car rests at this point, and has a mass of…

A:

Q: A 0.200-kg particle has a speed of 1.50 m/s at point and kinetic energy of 7.10 J at point Ⓡ. (a)…

A: Given  Mass , m = 0.200 kg  Speed at point A , VA = 1.50 m/s  Kinetic energy at point B , KB = 7.10…

Q: A 1000kg elevator, initially at rest, suffers a catastrophic mechanical failure and free falls 20m…

A:

Q: A 0.400-kg particle has a speed of 1.50 m/s at point A and kinetic energy of 7.60 J at point B. (a)…

A: Let the mass of the particle be denoted as mKinetic energy at point A and B be denoted as (K.E)A…

Q: Dan can consistently throw a 0.200-kg ball at a speed of 12.0 m/s. On one such throw, Dan throws the…

A:

Q: A skateboarder starts up a 1.0-m-high, 30° ramp at a speed of 8.2 m/s. The skateboard wheels roll…

A: Given, height from where skate board start (h) = 1 m Speed = 8.2 m/s

Q: A spring-loaded toy gun is used to launch a 10 g plastic ball. The spring, which has a spring…

A:

Q: A ball has a total energy of 140 J when it is dropped from rest from a height of 20 meters. Assuming…

A:

Q: 3. What is the potential energy formula?          a. What is the unit of measurements that each has…

A: potential energy [P.E  or U] PE = mgh where, a. PE is the potential energy of the object in…

Q: A 0.200-kg particle has a speed of 2.30 m/s at point O and kinetic energy of 7.10 J at point B. (a)…

A: Mass of the particle m=0.200 kg The speed of the particle at point A ,vA=2.30 m/s  The kinetic…

Q: A 50kg open cart is rolling to the left at a speed of 3 m/s. There is a chute for packages to slide…

A: Given: The mass of the cart is 50 kg. The speed of the cart is 3 m/s. The mass of the package is 15…

Q: 4. A 200 kg boulder slides down a hill. At the bottom of the hill its velocity is 2.2 m/s. a. What…

A: Mass of boulder slide =200kg Velocity at bottom = 2.2m/s

Q: 2.)A skate boarder dog has a mass of 35kg that includes the dog and board A.) how much work must be…

A: 2A.  Using Work-energy theorem: W_net = dKE W_net = KEf - KEi W_net = (1/2)*m*Vf^2 - (1/2)*m*Vi^2 Vi…

Q: 1. Sketch the following scenarios and use the appropriate formulas to solve: a) What is the kinetic…

A: a) mass (m) = 3 kg speed (v) = 4 ms

Q: A rubber ballI, with a mass of 40.0 grams is dropped from rest from a height of 1.20 m above the…

A: Given: Mass of ball, m=40.0 g Height above which the ball is at rest, y=1.20 m Maximum renounced…

Q: A 3.2 kg ball that is moving straight upward has 17 J of kinetic energy and its total mechanical…

A: “Since you have posted a question with multiple sub-parts, we will solve first three sub-parts for…

Q: A 1.0-kg ball at the end of a 2.0-m string swings in a vertical plane. At its lowest point the ball…

A: (a) Apply principle of conservation of energy…

Q: A 0.50 kg stone is dropped from rest from the top of a 2.0 m high wall. At the start of the drop,…

A:

Q: Part A A cannon tilted up at a 29.0 ° angle fires a cannon ball at 68.0 m/s from atop a 10.0 m-high…

A: initial KE =12mu2 initial PE = mgh

Q: 0.800-kg particle has a speed of 2.10 m/s at point  and kinetic energy of 7.80 J at point . (a)…

A:

Q: You throw a ball into the air. You let the ball go at a height of 1.5 m, and the ball is moving at a…

A: Initial Height , h = 1.5 m Initial velocity , u = 8 m/s Mass , m =0.5 kg To find = a) Initial Total…

Q: Jeff lifts a 6000-g metal ball from the ground to a height of 35 inches close to his body. What is…

A: Given: mass of ball m = 6000 g = 6 kg height h = 35 inch = 35*0.0254 m = 0.889 m

Q: C7 19.) You reach out the second story window, which is 5 m above the sidewalk, and throw a 0.5 kg…

A:

Q: 150 kg object is at a height of 12 m. A.) How many joules of kinetic energy does it gain when it…

A: Given: Mass of object, m=150 kg Height at which object is located, h=12 m To determine: A). Kinetic…

Q: A 0.40 kg block can slide up and down a rough  a 10-m-high, 30-m-long slope. At the bottom, a stiff…

A: Given: Mass of the block, m=0.4 kg Spring force constant, k=800 N/m Compression of the spring,…

Instantaneous Power

Power is defined in physics as the amount of energy transmitted or transformed per unit time. The watt is the unit of electricity in the International System of Units, equivalent to one joule per second.