GuideFoot - Learn Together, Grow Smarter. Logo

Questions in physics

📝 Answered - What is the velocity of a 500-kilogram elevator that has 4,000 joules of energy?

📝 Answered - A snail can move approximately 0.30 meters per minute. How many meters can the snail cover in 15 minutes?

📝 Answered - Emily’s vacuum cleaner has a power rating of 200 watts. If the vacuum cleaner does 360,000 joules of work, how long did Emily spend vacuuming?

📝 Answered - A force of 100 newtons is used to move an object a distance of 15 meters with a power of 25 watts. Find the work done and the time it takes to do the work.

📝 Answered - Derive a relation between the Universal Gravitational Constant ([tex]G[/tex]) and acceleration due to gravity ([tex]g[/tex]).

📝 Answered - What's the efficiency of a car that uses 400,000 J of energy from gasoline to produce 48,000 J of kinetic energy?

📝 Answered - Which form of energy does a plant store when light is transformed during photosynthesis? A. Chemical energy B. Thermal energy C. Mechanical energy D. Electrical energy

📝 Answered - True or False: Along a divergent boundary, two plates slip past each other, moving in opposite directions.

📝 Answered - 1. How does friction affect forward motion? Give an example. 2. Describe two ways to change the frictional force between two solid surfaces. - Change the lubrication between the two surfaces. - Change the normal force between the two surfaces. 3. How does air resistance affect the velocity of a falling object? 4. What two sources of friction do you have to overcome when you are walking? 5. If you push a chair across the floor at a constant velocity, how does the force of friction compare with the force exerted? Explain. 6. If you push a book against a wall hard enough, it will not slide down even though gravity is pulling it. Use what you know about Newton’s laws of motion to explain why the book doesn’t fall.

📝 Answered - Newtons third law of motion is also known as the law of ?