heavyhearttim
09.03.2020 •
Physics
The height of a projectile t seconds after it is launched straight up in the air is given by f (t )equals negative 16 t squared plus 238 t plus 3. Find its acceleration at 5 seconds.
Solved
Show answers
More tips
- C Computers and Internet How to Learn to Type Fast?...
- F Food and Cooking Delight for Gourmets: How to Prepare Liver Pate...
- S Style and Beauty How to braid friendship bracelets?...
- H Health and Medicine Mercury Thermometer Danger: What to do when a thermometer breaks?...
- F Food and Cooking Which Calamari Salad is the Most Delicious?...
- S Society and Politics 10 Tips for Boosting Your Self-Esteem...
- F Food and Cooking The Most Delicious and Simple Fish in Batter Recipe...
- H Health and Medicine What is Autism? Understanding the Basics of This Neurodevelopmental Disorder...
- P Philosophy How to Develop Extrasensory Abilities?...
- S Style and Beauty Don t Sacrifice Your Brows: How to Properly Pluck Stubborn Hairs...
Answers on questions: Physics
- P Physics Show that lagrange’s equations in the form of eqs. (1.53) can also be written as ∂t˙ ∂ ˙ q j − 2 ∂t ∂q j = q j . these are sometimes known as the nielsen form of the lagrange...
- P Physics Apiece of wood is floating in a tub of water. a second piece of wood rest on top of the first piece; it does not touch the water. if the second piece is removed from the first...
- P Physics Two charges, q1 and q2, are separated by 6·cm. the repulsive force between them is 25·n. in each case below, find the force between them if the original situation is changed...
- P Physics What is the current in a wire of radius r = 3.40 mm if the magnitude of the current density is given by (a) j a = j r/r and (b) j b = j (1 – r/r), in which r is the radial distance...
- P Physics Calculate the number of vacancies per cubic meter at 1000°c for a metal that has an energy for vacancy formation of 1.22 ev/atom, a density of 6.25 g/cm3, and an atomic weight...
- P Physics Apuzzle to think about: two weights of mass 1 kg hang from strings which go over pulleys (see illustration below). the strings are attached to the two ends of a spring scale...
- P Physics An 1800 kg elevator moves up and down on a cable. You must draw the free body diagram and then Calculate the tension force in the cable for the following cases: • the elevator...
- P Physics Two balls, ball A and ball B, are dropped from the same height onto the same surface. If ball A rebounds to a higher height than ball B then:(3) A. ball A is more elastic than...
- P Physics If given a device that has unknown circuitry, and you measure that the voltage across the device leads the voltage across a resistor at 500Hz, can you know what type of elements...
- P Physics Why do scientists look at stars rather than trying to look directly for planets?...
Ответ:
Explanation:
Instant Acceleration
The kinetic magnitudes are usually related as scalar or vector equations. By doing so, we are assuming the acceleration is constant over time. But when the acceleration is variable, the relations are in the form of calculus equations, specifically using derivatives and/or integrals.
Let f(t) be the distance traveled by an object as a function of the time t. The instant speed v(t) is defined as:
And the acceleration is
Or equivalently
The given height of a projectile is
Let's compute the speed
And the acceleration
It's a constant value regardless of the time t, thus
Ответ:
the Czech rebublic and Slovakia