The answer for the online test is going to be the last one, D
Work = force x distance. In units, Joules = Newtons x meters.
So: Work = 50 Newtons x 3 meters
Work = 150 joules. Answer D is correct
FYI - to ace physics, you should learn to identify these values using their fundamental units:
Force = Newtons = Kg·m/s²
Work = joules = kg·m²/s²
Power = watts = kg·m²/s³
In high school physics, If you learn to arrange equations so the units work out properly for the answer, you'll get most problems correct.
Answer:
a.The atomic radii increases from top to bottom within a group.
Explanation:
We know that
When we move from top to bottom in a group then the atomic radii increases When we move from top to bottom in a group then number of shell increases.
Therefore, the distance of electron in outermost shell from the nucleus is also increase.Hence, the atomic radii increases.
But when we move from left to right in a group then nuclear pull increases because number of electron increases in the same shell.
Therefore, size of atom decreases and atomic radii decreases.
Hence, the atomic radii increases as one moves from top to bottom within a group.
Options:
a) An arrow of magnitude 852.6 N points perpendicular to the slope of the hill.
b) An arrow of magnitude 6.50 N points down the slope of the hill.
c) An arrow of magnitude 78.5 N points down the slope of the hill.
d) An arrow of magnitude 852.6 N points straight down.
Answer:
d) An arrow of magnitude 852.6 N points straight down.
Explanation:
The total mass of the two riders, m = 87.0 kg
The free body diagrams of the situation described are drawn and contained in the files attached to this solution.
Note that the weight of the toboggan will act directly downwards.
Therefore, the weight of the toboggan, W = mg
W = 87 * 9.8
W = 852.6 N
Since the arrow representing the weight of the toboggan points straight down, the correct answer is that an arrow of magnitude 852.6 N points straight down.