Recent questions tagged force displacement work

+2 votes

1 answer

A linear spring, F = ks (x − x0), with spring constant ks = 35 lbf/ft, is stretched until it is 2.5 in. longer. Find the required

asked Apr 6, 2019 in Mathematics by kratos

+2 votes

1 answer

Two hydraulic cylinders maintain a pressure of 1200 kPa. One has a cross sectional area of 0.01 m^2 the other 0.03 m^2.

asked Apr 5, 2019 in Mathematics by kratos

+2 votes

1 answer

A car drives for half an hour at constant speed and uses 30 MJ over a distance of 40 km. What was the traction force to the road and its speed?

asked Mar 30, 2019 in Mathematics by kratos

+3 votes

1 answer

A drag force on a car, with frontal area A = 2 m^2, driving at 80 km/h in air at 20°C is Fd = 0.225 A ρairV^2.

asked Feb 18, 2019 in Class 9 by kratos

+3 votes

1 answer

A 1500 kg car carrying four 75 kg people moves over a "washboard" dirt road with corrugations 4 m apart,

asked Feb 5, 2019 in JEE by kratos

+2 votes

1 answer

The air drag force on a car is 0.225 A ρV^2. Assume air at 290 K, 100 kPa and a car frontal area of 4 m^2 driving at 90 km/h. How much energy

asked Jan 25, 2019 in Mathematics by kratos

+2 votes

1 answer

A linear spring, F = ks (x − x0), with spring constant ks = 500 N/m, is stretched until it is 100 mm longer. Find the required force and work input.

asked Dec 26, 2018 in Mathematics by kratos

+3 votes

1 answer

A hydraulic cylinder has a piston of cross sectional area 25 cm^2 and a fluid pressure of 2 MPa. If the piston is moved 0.25 m

asked Dec 19, 2018 in Mathematics by kratos

+3 votes

1 answer

A nonlinear spring has the force versus displacement relation of F = kns(x − x0) n. If the spring end is moved to x1

asked Nov 27, 2018 in Mathematics by kratos

+3 votes

1 answer

An escalator brings four people of total 300 kg, 25 m up in a building. Explain what happens with respect to energy transfer

asked Sep 16, 2018 in Mathematics by kratos

+3 votes

1 answer

The rolling resistance of a car depends on its weight as: F = 0.006 mg. How long will a car of 1400 kg drive for a work input of 25 kJ?

asked Sep 10, 2018 in Mathematics by kratos

+2 votes

1 answer

One kilopond (1 kp) is the weight of 1 kg in the standard gravitational field. How many Newtons (N) is that?

asked Sep 9, 2018 in Class 11 by kratos

+3 votes

1 answer

A hydraulic cylinder of area 0.01 m2 must push a 1000 kg arm and shovel 0.5 m straight up. What pressure is needed

asked Sep 7, 2018 in Mathematics by kratos

+1 vote

1 answer

An escalator raises a 100 kg bucket of sand 10 m in 1 minute. Determine the rate of work done during the process.

asked Aug 11, 2018 in JEE by kratos

+2 votes

1 answer

An old abandoned saltmine, 100 000 m^3 in volume, contains air at 290 K, 100 kPa. The mine is used for energy storage so the local power plant

asked Jul 7, 2018 in Mathematics by kratos

+2 votes

1 answer

Consider the car with the air drag force How fast can it drive using 30 hp?

asked Jun 20, 2018 in Mathematics by kratos

+1 vote

1 answer

A piston of mass 2 kg is lowered 0.5 m in the standard gravitational field. Find the required force and work involved in the process.

asked Jun 14, 2018 in Mathematics by kratos

+2 votes

1 answer

Assume that the drag force on a football depends only on the density of the air, velocity of the ball and the cross-

asked May 27, 2018 in JEE by kratos

+3 votes

1 answer

A drag force on an object moving through a medium (like a car through air or a submarine through water) is Fd = 0.225 A ρV^2.

asked May 12, 2018 in JEE by kratos

+2 votes

1 answer

Assume that you are travelling at a speed of 90 km/h in a small car with a mass of 1050 kg.

asked May 5, 2018 in Class 12 by kratos