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AleksAgata [21]
3 years ago
7

In order to increase the amount of work completed, it is necessary to decrease the force applied to an object. decrease the time

to do the work. increase the time to do the work. increase the force applied to the object.
Physics
2 answers:
Misha Larkins [42]3 years ago
8 0

Increase force applied to object


wlad13 [49]3 years ago
5 0
<span> <span> The answer to your question is: increase the force applied to the object.

Two items are provided as a basis for that conclusion:
1. According to Newton's Second Law of Motion, the formula for finding force is: F = ma
where F is the force,
m is the mass of an object,
and a is the acceleration of the object.

And 2: work = force x distance or W = F x d.</span></span>
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Two constant forces act on an object of mass m = 5.60 kg object moving in the xy plane as shown in the figure below. Force F1 is
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Answer:

Part a)

F_1 = 22.5\hat i + 15.7 \hat j

F_2 = -35.5 \hat i + 20.5 \hat j

Part b)

F = -10 \hat i + 36.2 \hat j

Part c)

a = -1.78 \hat i + 6.46 \hat j

Part d)

v_f = -0.64 \hat i + 21.93\hat j

Part e)

r_f = 6.09\hat i + 36.72 \hat j

Part f)

KE = 1347.7 J

Part g)

KE = 1348 J

Explanation:

Part a)

first force is given as

F_1 = 27.5 N at 35 degree

F_1 = 27.5 cos35 \hat i + 27.5 sin35 \hat j

F_1 = 22.5\hat i + 15.7 \hat j

Second force is given as

F_2 = 41 N at 150 degree

F_2 = 41 cos150 \hat i + 41 sin150\hat j

F_2 = -35.5 \hat i + 20.5 \hat j

Part b)

Total force is given as

F = F_1 + F_2

F = (22.5 - 35.5)\hat i + (15.7 + 20.5)\hat j

F = -10 \hat i + 36.2 \hat j

Part c)

as we know

F = ma so object acceleration is given as

a = \frac{F}{m}

a = \frac{-10}{5.60} \hat i + \frac{36.2}{5.60} \hat j

a = -1.78 \hat i + 6.46 \hat j

Part d)

By kinematics we know that

v_f = v_i + at

v_f = (4.70 \hat i + 2.55 \hat j) + (-1.78\hat i + 6.46\hat j)(3)

v_f = -0.64 \hat i + 21.93\hat j

Part e)

As we know that final position is given as

r_f = v_i t + \frac{1}{2}at^2

r_f = (4.70 \hat i + 2.55 \hat j)(3) + \frac{1}{2}(-1.78 \hat i + 6.46 \hat j)(3^2)

r_f = 6.09\hat i + 36.72 \hat j

Part f)

final kinetic energy is given as

KE = \frac{1]{2}mv_f^2

KE = \frac{1}{2}(5.60)(0.64^2 + 21.93^2)

KE = 1347.7 J

Part g)

final kinetic energy is given as

KE = KE_i + F.r

KE = \frac{1}{2}(5.60)(4.70^2 + 2.55^2) + (-10 \hat i + 36.2 \hat j).(6.09\hat i + 36.72\hat j)

KE =80 + 1268.4

KE = 1348 J

4 0
3 years ago
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