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horrorfan [7]
3 years ago
9

What force is required to give an object with mass 2000 kg an acceleration of 3.5 m/s2

Physics
2 answers:
ch4aika [34]3 years ago
8 0
According to Newton's Second Law:
F = m*a = 2000 kg*3.5 m/s^2 = 7000 N
Alex787 [66]3 years ago
4 0

<u>Answer:</u> The force exerted on the object is 7000 N

<u>Explanation:</u>

Force is defined as the push or pull on an object with some mass that causes change in its velocity.

It is also defined as the mass multiplied by the acceleration of the object.

Mathematically,

F=m\times a

where,

F = force exerted on the object

m = mass of the object = 2000 kg

a = acceleration of the object = 3.5m/s^2

Putting values in above equation, we get:

F=2000kg\times 3.5m/s^2\\\\F=7000N

Hence, the force exerted on the object is 7000 N

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A rocket at rest with a mass of 942 kg is acted on by an average net force of 6,731 N upwards for 21 s. What is the final veloci
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Answer:

Explanation:

Givens

m = 942

F = 6731

t = 21 seconds

vi = 0

vf = ?

Formula

F = m * (vf -  vi )  / t

Solution

6731 = 942*(vf - 0)/21          Multiply both sides by 21

6731 * 21 = 942*vf

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141351/942 = vf

vf = 151 m/s

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A car of mass 998 kilograms moving in the positive y–axis at a speed of 20 meters/second collides on ice with another car of mas
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This is this is total momentum in the x direction before the collision. B is the correct answer. Since momentum is conserved in both directions, this will be total momentum is the x direction after the collision. To prove that this is true, let’s determine the magnitude and direction of the total momentum after the collision.

Since the y axis and the x axis are perpendicular to each other, use the following equation to determine the magnitude of their final momentum.

Final = √(x^2 + y^2) = √(20,400^2 + 19,960^2) = √814,561,600

This is approximately 28,541. To determine the x component, we need to determine the angle of the final momentum. Use the following equation.

Tan θ = y/x = 19,960/20,400 = 499/510
θ = tan^-1 (499/510)

The angle is approximately 43.85˚ counter clockwise from the negative x axis. To determine the x component, multiply the final momentum by the cosine of the angle.

x = √814,561,600 * cos (tan^-1 (499/510) = 20,400</span>
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