To begin to lift the car, a hydraulic jack must produce <em>more than 9,800N</em> of force.
To keep the car in position once it is lifted, the jack must produce <em>exactly 9,800N</em> of force.
Answer:
22 N applied force
Explanation: Since they are both pushing the wagon in the same direction the force adds up.
<span>Manipulated (or Independent) Variable: This is the variable you will change in your experiment.
Therefore, in the experiment when </span>two dry sand samples are examined by changing one parameter. The independent variable will be the <span>mass of each sample.</span>
Answer:
Explanation:
The box is at rest because , the component of weight along the surface downwards is equal to frictional force .
frictional force = mgsinθ
= 20 x 9.8 sin 30
= 98 N .
