# a crane on a building site lifts bricks of total mass 200 kg

• 11 A crane on a building site lifts bricks of total mass 200 kg, initially at rest on the ground, with uniform acceleration. When the bricks are 5.0m from the ground, they have a speed of 5.0 m/s. How much work is done during this process? A 2.5k B 10.0kJ C 12.5kJ D

• ## 11 A crane on a building site lifts bricks of total mass 200 …

11 A crane on a building site lifts bricks of total mass 200 kg, initially at rest on the ground, with uniform acceleration. When the bricks are 5.0m from the ground, they have a speed of 5.0 m/s. How much work is done during this process? A 2.5kJ B 10.0kJ C 12.5kJ

• 11 A crane on a building site lifts bricks of total mass 200 kg, initially at rest on the ground, with uniform acceleration. When the bricks are 5.0 m from the ground, they have a speed of 5.0 m / s. How much work is done during this process? A 2.5 kJ B 10.0 kJ

• A crane on a building site lifts bricks of total mass 200 kg, initially at rest on the ground, with uniform acceleration. When the bricks are 5.0 m from the ground, they have a speed of 5.0 m / s. How much work is done during this process?

• A crane on a building site lifts bricks of total mass 200 kg, initially at rest on the ground, with uniform acceleration. When the bricks are 5.0m from the ground, they have a speed of 5.0m/s.

• A crane on a building site lifts a 200 kg steel girder 30 m into the air. a. Calculate the potential energy gained by the girder. (3 marks) b. If the cable breaks when the girder is at a height of 30 metres, with what velocity will it hit the ground? (4 marks) c.

• • ## A crane can lift 5,000 kg of mass to the height of 10 m in …

Given your use of round numbers, I’ll use the same for the acceleration due to gravity. 10 m/s^2. That means the work done per second is 5000 kg x 10 m/s^2 x 1 m/s = 50 000 kg m^2 s^-3. (Note that the grouping into lots of 3 digits is done by a space, not a comma). Now, 50 000 kg …

• (Total 14 marks) Q14.The Thrust SSC car raised the world land speed record in 1997. The mass of the car was 1.0 × 104 kg. A 12 s run by the car may be considered in two stages of constant acceleration. Stage one was from 0 to 4.0 s and stage two 4.0 s to

• In order to appreciate the usefulness of the crane, we need to know how quickly it can do the work of lifting the cargo. Suppose the crane lifts the cargo in 5 seconds: Work done by the crane per second =. The work done by the crane per second is known as its power. Power is the rate of working. POWER =.

• 2015/3/13 · Since you provided no number, let’s say the cable is 2 kg/m. You can fill in your own number in the second equation below. There are two portions to this: Lifting the weight: Force needed is m*g (Newton) and 1J=1Nm so the work is: W_w=m*g*h=150*9.8*50=73500J=73.5kJ Lifting the cable: While lifting the cable, less and less has to be lifted, so the force needed to do this diminishes. If we call

• A crane on a building site lifts a 200 kg steel girder 30 m into the air. a. Calculate the potential energy gained by the girder. (3 marks) b. If the cable breaks when the girder is at a height of 30 metres, with what velocity will it hit the ground? (4 marks) c.

• ## PQ 11 Questions and Answers

Work done = potential energy gained (g = ION/kg) 1500 X 10 x 12 – 1 80 work done Power — time taken 1 80 – 12000th/ or 12kW 15 A crane lifts a load of bricks of mass 1 200 kg onto a building of height 12m. The carrier itself has a mass of 300 kg. What minimum

• Eg. A crane can lift a 200kg mass through a vertical height of 5m in 4s. Calculate i. the power output of the motor driving the crane ii. the efficiency of the motor if the power input is 5kW i. power output = work done/time taken = (200 x 10 x 5)/4 = 2500W Friction

• A crate of mass 200 kg is to be brought from a site on the ground floor to a third floor apartment. The workers know that they can either use the elevator first, then slide it along the third floor to the apartment, or first slide the crate to another location marked C below, and then take the elevator to the third floor and slide it on the third floor a shorter distance.

• Gravitational potential energy is one type of potential energy and is equal to the product of the object’s mass (m), the acceleration caused by gravity (g), and the object’s height (h) as distance from the surface of the ground (the body). In this example, a 3 kilogram mass, at a height of 5 meters, while acted on by Earth’s gravity would have 147.

• 6 hook © UCLES 2013 0625/33/M/J/13 For Examiner’s Use 4 A large crane has a mass of 8500 kg. Fig. 4.1 shows the crane on a muddy building-site. lifting-arm axle caterpillar tracks Fig. 4.1 (a) Calculate the weight of the crane.

• ## POP4e: Ch. 1 Problems – HCC Learning Web

A sledge loaded with bricks has a total mass of 18.0 kg and is pulled at constant speed by a rope inclined at 20.0° above the horizontal. The sledge moves a distance of 20.0 m on a horizontal surface. The coefficient of kinetic friction between the sledge and surface is 0.500.

• Solution" Given: m =80.0 kg, h = 0.600 m, and d = 0.0150 m"" Find:"net F.U sing"W = Fd and"the"workSenergy"theorem"gives:"W = F j d = mgh" 3.136 10 N. 0.0150 m (80.0 kg)(9.80 m/s2)(0.600) 4 = = = × d mgh F " N m F j g " (a)"Now, looking"atF =

• In order to appreciate the usefulness of the crane, we need to know how quickly it can do the work of lifting the cargo. Suppose the crane lifts the cargo in 5 seconds: Work done by the crane per second =. The work done by the crane per second is known as its power. Power is the rate of working. POWER =.

• 2015/3/13 · Since you provided no number, let’s say the cable is 2 kg/m. You can fill in your own number in the second equation below. There are two portions to this: Lifting the weight: Force needed is m*g (Newton) and 1J=1Nm so the work is: W_w=m*g*h=150*9.8*50=73500J=73.5kJ Lifting the cable: While lifting the cable, less and less has to be lifted, so the force needed to do this diminishes. If we call

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