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Katyanochek1 [597]
3 years ago
14

Gabriel desplaza 2,5 m una caja de 40 kg de masa sobre

Physics
1 answer:
soldier1979 [14.2K]3 years ago
7 0

Answer:

El trabajo es  550 n*N

Explanation:

El trabajo se define como un movimiento de una masa al aplicarle una fuerza.

De tal forma que lo podemos escribir como:

W = F*d

Donde se asume que la fuerza se aplica en la misma direccion que el movimiento.

En este caso, sabemos que la caja se mueve una distancia d = 2.5m

Y la fuerza aplicada es 220 N, (la fuerza es paralela a la superficie, entonces se aplica en la misma direccion en la que la caja se mueve)

Entonces el trabajo sera:

W = 2.5m*220N = 550 n*N

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You are launching a 2 kg potato out of a potato cannon. The cannon is 2.0 m long and is aimed 70 degrees above the horizontal. I
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Answer:

Explanation:

The net force on the potatoes is given by:

F= 52 - mgSintheta

F= 52- (2×9.8× Sin70°)

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Using Newton's 2nd law

F = ma

a=F/m = 33.58/ 2 = 16.79m/s^2

Using the equation of motion:

V^2= u^2 + 2as

V^2 = 0 + 2× 16.79 x2

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V=sqrt(68.16)

V= 8.195m/s This is the exit velocity of the potatoes

Kinetic energy, K.E = 1/2mv^2

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You are traveling on an interstate highway at the posted speed limit of 70 mph when you see that the traffic in front of you has
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Explanation:

Given

Initial velocity=70 mph\approx 31.29 m/s

velocity after 5 s is 30 mph\approx 13.41 m/s

Therefore acceleration during these 5 s

a=\frac{v-u}{t}

a=\frac{13.41-31.29}{5}=-3.576 m/s^2

therefore time required to stop

v=u+at

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