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4 years ago

8

A worker with spikes on his shoes applies a constant horizontal force of 20 N to push a 40-kg box across a frictionless, frozen

lake. What is the acceleration of the box?
2.0 m/s^2
0.5 m/s^2
4.1 m/s^2
8.0 m/s^2

2 answers:

Marina86 [1]4 years ago

5 0

Answer:

0.5m/s2

Explanation:

because since newtons third law states that f=ma

hence force is 20N and m=40kg

hence by substituting in formula we get a=0.5m/s2

Kruka [31]4 years ago

5 0

The acceleration of the box will be ${\bold0.5 m/s^2.}$

Explanation:

Given:

Constant horizontal force on the box= 20 N

Mass of the box=40kg

To Find:

Acceleration of the box=?

Solution:

According to Newton's Second Law,

Force = Mass x Acceleration

On substituting the values,

$20 = 40 \times Acceleration$

Solving the equation for Acceleration

$20 = 40 \times Acceleration$

$Acceleration= \frac{1}{2}$

$Acceleration = 0.5 m/s^2$

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A wire 95.0 mm long is bent in a right angle such that the wire starts at the origin and goes in a straight line to x = 40.0 mm

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Answer:

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$36.03^{\circ}\ or\ 323.97^{\circ}in\ CCW\ direction$

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The angle the force makes is given by

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if 162.4 j of heat are added to a gas contained within a cylinder and the gas expands, doing 87.3 j of work, what is the change

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Calculation:

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<u />

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