Distance a
7. Classify the following situations
as examples of Newton's first law,
second law and third law. Justify your
classification
A portrait hung on the wall does
not move.
Time
Figure 1.16
b Pushing a child on a swing is much
easier than an adult on it.
A A person pulls a table cloth swiftly and plates and mugs remains on the
table.
d A ball moves fast if kicked hard.
e A bird flaps its wings to fly higher.
C
long has it​

Which expression allows you to determine the mechanical advantage of an inclined plane? a. height of plane / input force b. length of plane / input force c. length of plane / height of plane d. height of plane / length of plane

Electric field of the earth. the earth has a net electric charge that causes a field at points near its surface equal to 150 n> c and directed in toward the center of the earth. (a) what magnitude and sign of charge would a 60-kg human have to acquire to overcome his or her weight by the force exerted by the earth’s electric field? (b) what would be the force of repulsion between two people each with the charge calculated in part (a) and separated by a distance of 100 m? is use of the earth’s electric field a feasible means of flight? why or why not?

Why is the use of carbon-14 limited