Please help! I don't understand how to do this! A babysitter pushing a stroller starts from rest and accelerates uniformly at a rate of 0.778 m/s^2. What is the velocity of the stroller after it has traveled 5.54 m?
Two objects have a gravitational force of attraction to each other, equal to 10 Newtons. What is their gravitational force if the distance between them is halved? I have the answer, however I do not know how to get to it. Please explain.
10. A roller coaster uses 800 000 J of energy to get to the top of the first hill. During this climb, it gains 500 000 J of potential energy and pauses (velocity = 0) for a fraction of a second at the very top before heading down the other side. a) Draw a Sankey diagram for the roller coaster’s climb. b) What's the kinetic energy at the very top? How do you know? c) What would be the "useful energy" during its climb to the top? How do you know? d) How much energy was lost due to friction? (Use Ebefore = Eafter). e) Calculate the efficiency of the roller coaster during this part of the ride (the climb). 11. The roller coaster goes over the top of the first hill and heads downwards. The roller coaster heads down and levels out as it hits the original level. a) Since they are back at the original level, what do we know about the potential energy at this point? Why? ______________________________________________________________ b) If we know that we lost 200 000J to heat energy, what is the kinetic energy at the bottom? (Use Ebefore = Eafter) c) What is the efficiency of the roller coaster during this part of the ride?
Subduction zones are associated with Group of answer choices below A. divergent boundaries. B. transform boundaries. C. convergent boundaries. D. none of these
A student travels on a motorcycle and moves at a constant speed of 80 k/h for 15 m, determine the distance traveled in that time
A plane is flying to Minnesota with a velocity of 373.52 km/h, N. The plane encounters a crosswind with a velocity of 64.90 km/h, W. What is the magnitude of the resultant velocity of the plane?
What is the normal force on an object weighing 437N at rest on an inclined plane with an angle of 29 degrees?
two forces, one of 12 N and another of 24 N, act on a body in such a way that they make an angle of 90° whith each other. find the resultant of the two forces.
An experimental apparatus is set up with a voltage difference between two electrodes of 93 kV. If an electron moves from the positively charged electrode to the negatively charged electrode in this apparatus, how much energy does the electron gain in joules and electron-volts? The electron gains energy of ______ picojoule, or in other words, ______ electron-volts.
Calculate the force between two charges of 0.65 coulomb each, separated by 1.2 meters. The force between these two charges is ___________million newtons. (Yes, these are not very realistic values.)
a mango tree dropped to the ground from the top of a tree 40m tall. Find How long it takes to the fruit to reach the group if acceleration due to gravity g=10m/s
A 22-g bullet traveling penetrates a 2.0-kg block of wood and emerges going If the block is stationary on a frictionless surface when hit, how fast does it move after the bullet emerges?
What is the acrynom for coping with an iTijury like a sprained ankle until you are able to get medical care?
