Show us Figure 1 and we'll have the answer in a flash. Without it, not a chance. That's why it's there.
Answer:
a = 1.764m/s^2
Explanation:
By Newton's second law, the net force is F = ma.
The equation for friction is F(k) = F(n) * μ.
In this case, the normal force is simply F(n) = mg due to no other external forces being specified
F(n) = mg = 15kg * 9.8 m/s^2 = 147N.
F(k) = F(n) * μ = 147N * 0.18 = 26.46N.
Assuming the object is on a horizontal surface, the force due to gravity and the normal force will cancel each other out, leaving our net force as only the frictional one.
Thus, F(net) = F(k) = ma
26.46N = 15kg * a
a = 1.764m/s^2
First let us calculate for the angle of inclination using
the sin function,
sin θ = 1 m / 4 m
θ = 14.48°
Then we calculate the work done by the movers using the
formula:
W = Fnet * d
So we must calculate for the value of Fnet first. Fnet is
force due to weight minus the frictional force.
Fnet = m g sinθ – μ m g cosθ
Fnet = 1,500 sin14.48 – 0.2 * 1,500 * cos14.48
Fnet = 84.526 N
So the work exerted is equal to:
W = 84.526 N * 4 m
<span>W = 338.10 J</span>
Answer:
Mass, m = 32 kg
Explanation:
Given that,
Force, F = 2000 N
The change in velocity, (v-u) = 50 m/s
Time, t = 0.8 s
We need to find the mass of the ball. The net force acting on an object is given by :
F = ma
Where a is acceleration
So, the mass of the ball is 32 kg.
X: No and Y: Sunlight Ingrid listed some important resources in a chart. Option D is correct.
<h3>What are fossil fuels?</h3>
Fossil fuels are obtained beneath the earth's crust which is formed due to buried plants and animals. the excessive heat under the earth's crust heats the plants and animals.
Fossil fuel took a long time to form it comes under the nonrenewable source of energy.
The use of fossil fuels such as coal, oil, and natural gas, and technical advancements in the contemporary age is driving the acceleration of change in human cultures today.
Ingrid listed some important resources in a chart is;
X: No
Y: Sunlight
Hence, option D is correct.
To learn more about the fossil fuel refer to the link;
brainly.com/question/2029072
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