Answer:
a) equal 1, b) less than 1
Explanation:
a) the electric force is given by
Fe = q E
The charge of the electron and proton has the same value, that of the proton is positive and that of the electron is negative
Proton
Fp = qE
Electron
Fe = - q E
Fp / Fe = -1
If we do not take into account the sign the relationship is equal to one (1)
b) to calculate the force we use Newton's second law
F = ma
qE = m a
a = q E / m
The mass of the proton much greater than the mass of the electron
ap = q E /
ae = - q E /
ap / ae = /
=
/1600
=1/1600
It is much smaller than 1
Answer:
The woman's force was directed 59.22⁰ to the horizontal.
Explanation:
Given;
work done by the woman, W = 236 J
distance through the load was moved, d = 24.4 m
applied force, F = 18.9 N
inclination of the force, = θ
The work done by the woman is calculated as;
W = Fdcosθ
Therefore, the woman's force was directed 59.22⁰ to the horizontal.
Answer:
Explanation:
In this case mechanical energy is conserved, which means that the sum of the initial kinetic energy and initial potential gravitational energy will be equal to the sum of the final kinetic energy and final potential gravitational energy:
Which in our case will be:
Which, since ,
,
,
and canceling <em>m</em> means that:
Solving for the final velocity we get:
Answer:
(a)
(b) h is the same
Explanation:
According to the law of conservation of energy:
The skier starts from rest, so and we choose the zero point of potential energy in the end of the ramp, so
. We calculate the final speed, that is, the speed when the skier leaves the ramp:
Finally, we calculate the maximum height h above the end of the ramp:
The initial vertical speed is given by:
and the final speed is zero, solving for h:
(b) We can observe that the height reached does not depend on the mass of the skier