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Mariulka [41]
2 years ago
13

An object is moving east, and its velocity changes from 65 m/s to 25 m/s in 10 seconds. Which describes the acceleration? negati

ve acceleration of 4 m/s2 positive acceleration of 4 m/s2 positive acceleration of 9 m/s2 negative acceleration of 9 m/s2
Physics
1 answer:
hammer [34]2 years ago
5 0

Answer:

we could use the formula, v=u+at,

65=25+a (10), a=4 , since the motion is declerating we have a=-4 m/s2

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xxMikexx [17]

Answer: 14.52*10^6 m/s

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the change in potential energy for the electron; e*ΔV is  equal to energy kinetic gained for the electron so:

e*ΔV=1/2*m*v^2  v^=(2*e*ΔV/m)^1/2= (2*1.6*10^-19*600/9.1*10^-31)^1/2=14.52 *10^6 m/s

3 0
1 year ago
An object is projected with initial speed v0 from the edge of the roof of a building that has height H. The initial velocity of
Vsevolod [243]

Answer:

Explanation:

Initial velocity u = V₀ in upward direction so it will be negative

u = - V₀

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Using the formula

v² = u² + 2 g s

v² = (- V₀ )² + 2 g H

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6 0
2 years ago
The boom hoisting sheave must have pitch diameters of no less than _______times the nominal diameter of the rope used.
alexira [117]

Answer:

18 times

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7 0
1 year ago
Define kinetic energy and thermal energy. Describe what happens to each as the temperature of a substances increases.
Margaret [11]

Answer:

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Explanation:

4 0
2 years ago
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Tems11 [23]

Answer:

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Explanation:

3 0
1 year ago
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