Physics
Physics, 21.08.2019 08:30, AshlynPlayz45

How can i calculate the average acceleration?

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Physics, 07.07.2019 17:00, RanaA5515
For no apparent reason, a poodle is running at a constant speed of 5.00 m/s in a circle with radius 2.9 m . let v⃗ 1 be the velocity vector at time t1, and let v⃗ 2 be the velocity vector at time t2. consider δv⃗ =v⃗ 2−v⃗ 1 and δt=t2−t1. recall that a⃗ av=δv⃗ /δt. a) for δt = 0.4 s calculate the magnitude (to four significant figures) of the average acceleration a⃗ av. b) for δt = 0.4 s calculate the direction (relative to v⃗ 1) of the average acceleration a⃗ av. c) for δt = 0.2 s calculate the magnitude (to four significant figures) of the average acceleration a⃗ av. d) for δt = 0.2 s calculate the direction (relative to v⃗ 1) of the average acceleration a⃗ av. e) for δt = 7x10^-2 s calculate the magnitude (to four significant figures) of the average acceleration a⃗ av. f) for δt = 7x10^-2 s calculate the direction (relative to v⃗ 1) of the average acceleration a⃗ av.
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Physics, 06.09.2019 21:30, xhdud
Arace finishes at the same place as it started. the contestants start from rest and cross the finish line running. which one of the following is true about the average speed, the average velocity, and the average acceleration? note that the symbol ≠ means "not equal to". a). average speed = 0 m/s, average velocity ≠ 0 m/s, average acceleration = 0 m/s2 b).average speed ≠ 0 m/s, average velocity = 0 m/s, average acceleration ≠ 0 m/s2 c).average speed = 0 m/s, average velocity = 0 m/s, average acceleration = 0 m/s2 d).average speed ≠ 0 m/s, average velocity = 0 m/s, average acceleration = 0 m/s2 e.)average speed ≠ 0 m/s, average velocity ≠ 0 m/s, average acceleration =0m/s^2
Answers: 2
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Physics, 23.09.2019 16:30, punkinrichard1oxon2i
Arace finishes at the same place as it started. the contestants start from rest and cross the finish line running. which one of the following is true about the average speed, the average velocity, and the average acceleration? note that the symbol ≠ means "not equal to". which one? a. average speed = 0 m/s, average velocity ≠ 0 m/s, average acceleration = 0 m/s2 b. average speed ≠ 0 m/s, average velocity = 0 m/s, average acceleration ≠ 0 m/s2 c. average speed = 0 m/s, average velocity = 0 m/s, average acceleration = 0 m/s2 d. average speed ≠ 0 m/s, average velocity = 0 m/s, average acceleration = 0 m/s2 e. average speed ≠ 0 m/s, average velocity ≠ 0 m/s, average acceleration =0m/s^2
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Physics, 01.10.2019 01:00, eburnhisel2023
Ihave these questions i need to find the acceleration, explain how to do them, don't have to explain all xd 1. change in speed = 14 m/s; time taken = 2 seconds. calculate the acceleration. 2. a car accelerates from rest (zero speed) up to a speed of 30 m/s in 12 seconds. calculate the acceleration. 3. a cyclist in the tour de france accelerates down a hill from 22 m/s to a speed of 37 m/s. this acceleration takes him 2 seconds. calculate the acceleration. 4. a rocket launching in the ukraine accelerates upwards from rest to a speed of 12 km/s in 8 seconds. calculate the acceleration. 5. a cyclist accelerates from 0 m/s to 8 m/s in 3 seconds. what is his acceleration ? is this acceleration higher than that of a car which accelerates from 0 to 30 m/s in 8 seconds? 6. a car advertisement states that a certain car can accelerate from rest to 70 km/h in 7 seconds. find the car’s average acceleration. 7. a lizard accelerates from 2 m/s to 10 m/s in 4 seconds. what is the lizard’s average acceleration? 8. if a ferrari, with an initial velocity of 10 m/s, accelerates at a rate of 50 m/s2 for 3 seconds, what will its final velocity be?
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