Answer:
The mass of the cable is 4.94 kg
Explanation:
It is given that,
Mass of the block, m = 20 kg
Force applied to the cable, F = 110 N
Speed of the block, v = 4.2 m/s
Distance, d = 2 m
Let a is the acceleration of the block. It can be calculated using the third equation of motion as :
Let m' is the mass of the cable. It can be calculated using the second law of motion as :
m = 4.94 kg
So, the mass of the cable is 4.94 kg. Hence, this is the required solution.
Answer
7 is d ii is a iii is d
4 is x is 52 and y is 0 = 68
5 is x is 0 = 145 and y is 128
6 is a
1 is 10.20
2 is 151 and 5010
3 is < is 0 and I is y
9 is 3.0 and 2.0
hope this helps
Answer:
d. none of these
Explanation:
From the given information:
Let assume that Percival catches Sir Rodney's horse in time "t" after covering a certain distance "s"
Then, using the second equation of motion:
FOR Percival, we have:
FOR Sir Rodney;
Equating both equations together; we have:
0.3t² = 3t
0.3t² - 3t = 0
0.3t(t - 10) = 0
If Percival's position at rest = 0
Then; t = 10 s.
If an object is moving, then its speed and the magnitude
of its velocity aren't zero.
If its velocity is constant (speed doesn't change and it's
moving in a straight line), then its acceleration is zero.
Looks like choice-D sums it up nicely.
