Hector drew the diagram below to illustrate projectile motion.
2 answers:
Let us review the answers given.
1. He should switch the labels "Gravity" and "Inertia".
These labels are correct, so no change is required.
2. He should make the arrow for "Path" curve downward.
This statement is correct.
3. He should switch the labels "Inertia" and "Path".
No change is required.
4. He should make the arrow for "Inertia" curve downward.
This statement is incorrect.
Answer:
Hector should make the arrow for "Path" curve downward as shown in the figure.
1. He should switch the labels "Gravity" and "Inertia".
These labels are correct, so no change is required.
2. He should make the arrow for "Path" curve downward.
This statement is correct.
3. He should switch the labels "Inertia" and "Path".
No change is required.
4. He should make the arrow for "Inertia" curve downward.
This statement is incorrect.
Answer:
Hector should make the arrow for "Path" curve downward as shown in the figure.
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Answer:
Option B is the correct answer.
Explanation:
Thermal expansion
L = 1.2 meter
ΔT = 65 - 15 = 50°C
Thermal Expansion Coefficient for aluminum, α = 24 x 10⁻⁶/°C
We have change in length
New length = 1.2 + 1.44 x 10⁻³ = 1.2014 m
Option B is the correct answer.
Answer:
150.8 J
Explanation:
The heat released by the copper wire is given by:
where:
m = 10.0 g is the mass of the wire
Cs = 0.377 j/(g.C) is the specific heat capacity of copper
is the change in temperature of the wire
Substituting into the equation, we find
And the sign is negative because the heat is released by the wire.
Mechanical advantage is defined as the ratio of output load to the input load. The mechanical advantage of the machine will be 0.1.
<h3>What is mechanical advantage?</h3>Mechanical advantage is a measure of the ratio of output force to input force in a system,
It is used to obtain the efficiency of forces in levers and pulleys. It is an effective way of amplifying the force in simple machines like levers.
The theoretical mechanical advantage is defined as the ratio of the force responsible for the useful work in the system to the applied force.
Given
applied force = 250 N
Output force = 25
Mechanical advantage = work output / work input
Hence the mechanical advantage of the machine will be 0.1
To learn more about the mechanical advantage refer to the link;