D is the answer
Velocity maybe negative or positive
while speed is always positive
Answer:
The horizontal force is 106.89 N.
Explanation:
Given that,
Work done = 310 J
Distance = 2.9 m
We need to calculate the horizontal force
Using formula of work done
Where, 
Put the value into the formula
Hence, The horizontal force is 106.89 N.
Answer:0.3meters
Explanation:
wavelength=velocity ➗ frequency
wavelength=300.80 ➗ 1030.80
Wavelength=0.3m
Alkali
The alkali metals are six chemical elements in Group 1, the leftmost column in the periodic table. They are lithium (Li), sodium (Na), potassium (K), rubidium (Rb), cesium (Cs), and francium (Fr).
Hope this is the brainliest answer.
If you know the amount of force acted on an object to find the amount actually being put onto it, you just add the amount of work done onto it, but if you are trying to find the difference between the amount of forces you just subtract the amount of force acting on the object.
