0.064N
0.025N
0.016N
0.008N
0.003N
Correct answer is A
Upthrust = Volume of fluid displaced =vpg =0.2 x 0.2 x 0.2 x0.8 x 10= 0.064N
100N
200N
400N
800N
1600N
Correct answer is A
W=\(\frac{mg}{4}= \frac{400}{4}=100N\)
5N 53° east of North
5N 53° west of the south
5N 37° north of east
7N 37° west of North
7N 37° south of west
Correct answer is C
No explanation has been provided for this answer.
Two blocks hit the ground simultaneously because they have the same acceleration
Two blocks reach the ground at the same time because their dimensions are the same
Wooden block being lighter than the steel block reaches the ground first
Steel block reaches the ground first because it is denser than the wooden block
Steel block takes half as much time as the wooden block to reach the ground because it is more massive than the wooden block
Correct answer is A
An object falling without air resistance or friction is defined to be in free-fall.
The acceleration of free-falling objects is therefore called the acceleration due to gravity.
It is because the acceleration due to gravity is constant for all objects regardless of the mass, neglecting air resistance.
17.3\(ms^{-2}\)
20\(ms^{-2}\)
24.5\(ms^{-2}\)
125\(ms^{-2}\)
200\(ms^{-2}\)
Correct answer is B
\(v^2=u^2 +2as =0 +2\times(25-5)\\ v^2 =0+20\times 20=400;v =\sqrt{400}= 20(ms^{-2}\)