Questions from College Physics

Q: A cable exerts a constant upward tension of magnitude 1.25

A cable exerts a constant upward tension of magnitude 1.25 x 104 N on a 1.00 x 103-kg elevator as it rises through a vertical distance of 2.00 m. (a) Find the work done by the tension force on the ele...

Q: A 0.60 - kg particle has a speed of 2

A 0.60 - kg particle has a speed of 2.0 m/s at point A and a kinetic energy of 7.5 J at point B. What is (a) Its kinetic energy at A? (b) Its speed at point B? (c) The total work done on the partic...

Q: A man pushing a crate of mass m = 92.0

A man pushing a crate of mass m = 92.0 kg at a speed of Ï… = 0.850 m/s encounters a rough horizontal surface of length â„“ = 0.65 m as in Figure P5.18. If the coefficient of...

Q: When a 2.50 - kg object is hung vertically on

When a 2.50 - kg object is hung vertically on a certain light spring described by Hooke’s law, the spring stretches 2.76 cm. (a) What is the force constant of the spring? (b) If the 2.50 - kg object i...

Q: In 1990 Walter Arfeuille of Belgium lifted a 281.5 -

In 1990 Walter Arfeuille of Belgium lifted a 281.5 - kg object through a distance of 17.1 cm using only his teeth. (a) How much work did Arfeuille do on the object? (b) What magnitude force did he exe...

Q: Calculate the elastic potential energy of a spring with spring constant k

Calculate the elastic potential energy of a spring with spring constant k = 225 N/m that is (a) Compressed and (b) Stretched by 1.00 x 10-2 m.

Q: True or False: The elastic potential energy of a stretched or

True or False: The elastic potential energy of a stretched or compressed spring is always positive.

Q: Elastic potential energy depends on the spring constant and the distance the

Elastic potential energy depends on the spring constant and the distance the spring is stretched or compressed. By what factor does the elastic potential energy change if the spring’s stretch is (a) D...

Q: A book of mass m is projected with a speed υ across

A book of mass m is projected with a speed υ across a horizontal surface. The book slides until it stops due to the friction force between the book and the surface. The surface is now tilted 30°, and...

Q: In Figure 5.5 (a)–(d), a block

In Figure 5.5 (a)–(d), a block moves to the right in the positive x - direction through the displacement Δx( while under the influence of a force with the same magnitude...