IdeasCuriosas - Every Question Deserves an Answer Logo

Questions in physics

[Answered] A small amplitude transverse wave is traveling on a string. The frequency of the wave is suddenly doubled. Which one of the following is a true statement? A. The period of the wave doubles B. The wavelength doubles C. The speed of the wave doubles D. The wavelength is cut in half E. The speed of the wave is cut in half

[Answered] A force of 20 newtons to the left is exerted on a cart for 10 seconds. For what period of time must a 50-newton force to the right act to produce an impulse of equal magnitude on the cart?

[Answered] What happens when velocity and acceleration are at right angles to each other?

[Answered] A man is on a game show. He is presented with two doors, one on the left and one on the right. Behind one door is 2 million dollars, and behind the other is a donkey. Choose the correct door to win the prize. There are also two men in front of the doors who know which door leads to the millions. One wears a black hat, the other wears a white hat. The host explains that one of the men is a liar and will always lie, while the other man will always tell the truth, but you don't know which is which. You can only ask one of the men one question. What is the question, and which man do you ask to ensure you win the money?

[Answered] A force of 300 N [S] is applied to a 50 kg box on a rough floor. The frictional force is 200 N. The acceleration is 2 m/s². If the 300 N force is removed after 4.0 seconds, how long will it take the box to come to rest? Please show all your work!

[Answered] Do heavier objects fall slower than lighter objects?

[Answered] Imagine an astronaut with a mass of 70 kg floating in space 10.0 m away from the center of gravity of an Apollo command module, whose mass is [tex]6.00 \times 10^{3}[/tex] kg. Determine the gravitational force acting on, and the resulting acceleration (at that instant) of both the ship and the astronaut.

[Answered] A 90-kg tight end moving at 9.0 m/s encounters a 400 N•s impulse. Determine the velocity change of the tight end.

[Answered] How much force does an 88 kg astronaut exert on his chair while accelerating straight up at [tex]10 \, \text{m/s}^2[/tex]?

[Answered] How do I determine which object has the greatest acceleration?