Answer:
a) 1.22 s
b) 9.089 m
Explanation:
t = Time taken
u = Initial velocity
v = Final velocity
s = Displacement
a = Acceleration due to gravity = 9.81 m/s²
Time taken by the ball to reach the highest point is 1.22 seconds
The maximum height the ball will reach above the ground is 1.75+7.339 = 9.089 m
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 frequency of this wave is .
Explanation:
The frequency of a wave is the number of wavelengths that this wave covers in unit time (typically a second.)
The wave in this question travels at . In other words, this wave covers
in unit time (a second.) How many wavelengths
would that
correspond to?
The question states that the wavelength of this wave is . Therefore, there would be
wavelengths in the
span that this wave covered in the unit time of one second (
.) Hence, the frequency of this wave would be
(three per second,) which is equivalent to
(three Hertzs.)
In general, the frequency of a wave with speed
and wavelength
would be:
.
For the wave in this question:
.
Answer:
The normal force is 85,42 N
Explanation:
There is no friction force, therefore there is no relationship between the normal force and the friction.
We can find the normal force using a free body diagram and check the forces that are acting on the sled. The total forces are equal to 0 because there is no movement in the y-axis. The movement exists only on the x-axis.
