We can determine the velocity of a wave when given the frequency and the wavelength
The velocity<span> of a </span>wave<span> is eqiuvalent to its wavelength multiplied by its</span><span> frequency</span>
If there is really no friction and no air resistance, then <em>NO force</em> is needed to keep an object moving in a straight line at constant speed. Check out Newton's first law of motion again.
The <em><u>gravity on the Earth</u></em> has acceleration is smallest in magnitude
Given:
- Acceleration from 0 to 30 m/s in 2 s
- Deceleration from 30 m/s to 10 m/s in 1.5 s
- Gravity on Earth
To find:
The accelerations with the smallest magnitude
Solution:
- Acceleration from 0 to 30 m/s in 2 s
The acceleration in 2 seconds:
The magnitude of the acceleration is 15.
- Deceleration from 30 m/s to 10 m/s in 1.5 s
The deceleration in 1.5 seconds:
The magnitude of the deceleration is 13.4.
The value of the acceleration due to gravity = 
The magnitude of the acceleration is 9.8.
9.8 < 13.4 < 15
The <em><u>gravity on the Earth</u></em> has acceleration is smallest in magnitude.
Learn more about the acceleration here:
brainly.com/question/2437624?referrer=searchResults
brainly.com/question/7488209?referrer=searchResults
Answer:
-63.6m/s
Explanation:
Given parameters:
Initial velocity = 5m/s
Time of flight = 7s
Unknown:
Velocity of the eraser after 7s = ?
Solution:
To solve this problem, we have to use the right motion equation which is given below;
v = u - gt
v is the final velocity
u is the initial velocity
g is the acceleration due to gravity = 9.8m/s²
t is the time taken;
Now insert the parameters and solve for v;
v = 5 - (9.8 x 7)
v = -63.6m/s
