What is the acceleration vector at t=4.5 seconds? What is the acceleration vector at t = 4.5 seconds?õ(t) = [(2.0t²)t + (8.0t)f+ 10k]m/s%3DA. a(4.5) = (18.0f + 8.0f)m/s²B. â(4.5) = (18.0t + 36.0)m/s²C. a(4.5) = (18.01 +8.0j +k)m/s2D. a(4.5) (18.08 + 36.0j + 45k)m/s²%3DODO BO AAddressASUS因17画f31sf8f11#3346.7.8.9.立%24

Given data: Velocity vector as function of time v→t = 2.0t2i^ +8.0tj^+10k^m/s Required: The…

Answered: What is the acceleration vector at t =…

What is the acceleration vector at t = 4.5 seconds? ö(t) = [(2.0t²)t+ (8.0t)f + 10k]m/s A. ã(4.5) = (18.0f + 8.0f)m/s? B. a(4.5) = (18.0î + 36.0f)m/s2 C. d(4.5) = (18.0 + 8.0j +k)m/s2 %3D %3D

Physics for Scientists and Engineers: Foundations and Connections

1st Edition

ISBN:9781133939146

Author:Katz, Debora M.

Publisher:Katz, Debora M.

Chapter2: One Dimensional Motion

Section: Chapter Questions

Problem 79PQ

See similar textbooks

Similar questions

In Michael Johnson's world-record 400 mm sprint, he ran the first 100 mm in 11.20 ss; then he reached the 200 mm mark after a total time of 21.32 ss had elapsed, reached the 300 mm mark after 31.76 ss, and finished in 43.18 ss. During what 100 mm segment was his speed the highest?
An interstellar ship has a mass of 1.20 * 106 kg and is initially atrest relative to a star system. (a) What constant acceleration is neededto bring the ship up to a speed of 0.10c (where c is the speed of light,3.0 *108 m/s) relative to the star system in 3.0 days? (b) What is that acceleration in g units? (c) What force is required for the acceleration?(d) If the engines are shut down when 0.10c is reached (thespeed then remains constant), how long does the ship take (start tofinish) to journey 5.0 light-months, the distance that light travels in5.0 months?
Studies of the relationship of the Sun to our galaxy— the Milky Way—have revealed that the Sun is located near the outer edge of the galactic disc, about 30 000 ly (1 ly 5 9.46 × 1015 m) from the center. The Sun has anorbital speed of approximately 250 km/s around the galactic center. (a) What is the period of the Sun’s galactic motion? (b) What is the order of magnitude of the mass of the Milky Way galaxy? (c) Suppose the galaxy is made mostly of stars of which the Sun is typical. What is the order of magnitude of the number of stars in the Milky Way?
A 0.20-kg rubber ball is dropped from a height of 1.0 m above the floor and it bounces back to a height of 0.70 m. (a) What is the ball’s speed just before hitting the floor? (b) What is the speed of the ball just as it leaves the ground? (c) How much energy was lost and where did it go?
A possible means of space flight is to place a perfectly reflecting aluminized sheet into orbit around the Earth and then use the light from the Sun to push this "solar sail." Suppose a sail of area A = 5.20 ✕ 105 m2 and mass m = 6,800 kg is placed in orbit facing the Sun. Ignore all gravitational effects and assume a solar intensity of 1,370 W/m2. (a) What force (in N) is exerted on the sail? (Enter the magnitude.) N (b) What is the sail's acceleration? (Enter the magnitude in µm/s2.) µm/s2 (c) Assuming the acceleration calculated in part (b) remains constant, find the time interval (in days) required for the sail to reach the Moon, 3.84 ✕ 108 m away, starting from rest at the Earth. days (d) What If? If the solar sail were initially in Earth orbit at an altitude of 300 km, show that a sail of this mass density could not escape Earth's gravitational pull regardless of size. (Calculate the magnitude of the gravitational field in m/s2.) m/s2 (e) What would the mass…
In an attempt to produce exotic new particles, a proton of mass mp = 1.67 1027 kg is accelerated to 0.99c (c = 3.00 108 m/s is the speed of light) and crashed into a helium nucleus of mass mHe = 6.64 1027 kg initially at rest. The collision is elastic. a. What is the kinetic energy of the helium nucleus after the collision? b. What is the kinetic energy of the proton after the collision? (In Chapter 39, well learn what Einstein says about making such calculations.)
A unit of distance used in astronomy is the parsec (pc): 1 pc = 3.26 ly. The distance to the Earths next-nearest star, -Centauri, is 1.3 pc. Find the distance d to -Centauri in light-years and in meters.
In Jules Vernes novel, Twenty Thousand Leagues Under the Sea, Captain Nemo and his passengers undergo many adventures as they travel the Earths oceans, a. If 1.00 league equals 3.500 km, find the depth in meters to which the crew traveled if they actually went 2.000 104 leagues below the ocean surface. b. Find the difference between your answer to part (a) and the radius of the Earth, 6.38 106 m. (Incidentally, author Jules Verne meant that the total distance traveled, and not the depth, was 20,000 leagues.)
Please answer and refer to the given multiple choice:) 7.) a.10 s, b. 15 s, c. 20 s d. 25 s 8.) a.1833.30m, b.2757.50m, c.462.10 d.2295.40m 9.) a.22.50 s, b.27.50 s , c.12.50 s d.17.50 s
(a) A person's "resting" heart rate is his or her normal heart rate measured while sitting still (and long after doing anything physically exerting). A nurse on Earth measures the resting heart rate of a patient as 76.0 beats/min. Imagine the patient travels aboard a space vessel moving with a constant speed of 0.97c with respect to the Earth. What would be the patient's resting heart rate (in beats/min) as measured by someone else aboard the vessel? (b) Imagine an observer on Earth could measure the resting heart rate of the patient traveling aboard the space vessel. What rate (in beats/min) would the observer on Earth measure?
A team of astronauts is on a mission to land on and explore a large asteroid. In addition to collecting samples and performing experiments, one of their tasks is to demonstrate the concept of the escape speed by throwing rocks straight up at various initial speeds. With what minimum initial speed ?esc will the rocks need to be thrown in order for them never to "fall" back to the asteroid? Assume that the asteroid is approximately spherical, with an average density ?=2.93×106 g/m3 and volume ?=1.94×1012 m3 . Recall that the universal gravitational constant is ?=6.67×10-11 N·m2/kg2 .vesc = ? m/s
(a) If an electron is projected horizontally with a speed of 3.0 * 106 m/s, how far will it fall in traversing 1.0 m of horizontal distance? (b) Does the answer increase or decrease if the initial speed is increased?