Answer:
2000 N
1600 N
Explanation:
Step 1:
It is given that the bear's weight is 2000 N and it slides down the tree with constant velocity. Since it is sliding with constant velocity the overall force on the bear is zero. The weight of the bear acting downward balances the upward force caused due to friction. Hence the upward force equals the weight 2000 N.
Step 2:
It is given that the bear slides down with an acceleration 2 m/sec sq
Weight of the bear = 2000 N
Mass of the bear = 2000/10 (taking g = 10 m/sec sq)=200 kg
Force = Mass * Acceleration
Hence net force acting downward = 200*2=400 N.
Net force = Weight of bear - Force acting upward on the bear
400 = 2000 - Force acting upward on the bear
Force on the bear acting upward = 2000 - 400 = 1600 N
As we presume that the fluid density is greater than the gas density based on common sense, the volume of the balloon decreases. The mass per unit volume is known as fluid density.
Greek letter stands in for and (rho). Mass per length squared, or M/L3, is the unit of measurement for density. Specific Weight vs. Weight Density: A fluid density, also known as specific density, is determined by dividing the fluid's weight by its volume. Weight per volume of a fluid is also referred to as weight density.
A mathematical term called "volume" describes how much three-dimensional space is occupied by an item or a closed surface. The measurement of volume is done in cubic units, like m3, cm3, in3, etc.
Learn more about fluid density here
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Precision refers to the closeness of two or more measurements to each other. Using the example above, if you weigh a given substance five times, and get 3.2 kg each time, then your measurement is very precise. Precision is independent of accuracy.
I think the answer is B ( matter )
