A force of gravity pulls downward on a book on a table. What force prevents the book from accelerating downward?

By what factor would you have to multiply the tension in a stretched string in order to double the wave speed?

If you stretch a rubber hose and pluck it, you can observe a pulse traveling up and down the hose. What happens to the speed of the pulse if you stretch the hose more tightly? What happens to the speed if you fill the hose with water?

If you stretch a rubber hose and pluck it, you can observe a pulse traveling up and down the hose. What happens to the speed of the pulse if you stretch the hose more tightly? What happens to the speed if you fill the hose with water?

A vibrating source generates a sinusoidal wave on a string under constant tension. If the power delivered to the string is doubled, by what factor does the amplitude change? Does the wave speed change under these circumstances?

How much force is required to accelerate a 12 kg mass at 5 m/s2?

__________ is the amount of matter in an object.

Explain Newton's first law of motion in your own words.

A cat pushes a $0.25-\mathrm{kg}$ toy with a net force of $8 \mathrm{~N}$. According to Newton's second law what is the acceleration of the ball?

A. $2 \mathrm{~m} / \mathrm{s}^2$

C. $16 \mathrm{~m} / \mathrm{s}^2$

B. $4 \mathrm{~m} / \mathrm{s}^2$

D. $32 \mathrm{~m} / \mathrm{s}^2$

If one end of a heavy rope is attached to one end of a light rope, the speed of a wave will change as the wave goes from the heavy rope to the light one. Will it increase or decrease? What happens to the frequency? What happens to the wavelength?

If the strong man in the preceding exercise exerts a downward force of $800 \mathrm{~N}$ on the rope, how much upward force is exerted on the block?

If one end of a heavy rope is attached to one end of a light rope, the speed of a wave will change as the wave goes from the heavy rope to the light one. Will the speed increase or decrease? What happens to the frequency? To the wavelength?

If one end of a heavy rope is attached to one end of a light rope, the speed of a wave will change as the wave goes from the heavy rope to the light one. Will it increase or decrease? What happens to the frequency? To the wavelength?

The diameter of a fire hose varies with the flow rate of water inside. The hose may be relatively narrow, and at another time puffed up like a fat snake. In which case is water flowing fast, and when is water hardly flowing at all?