A body of mass 15kg is placed on a smooth ...
A body of mass 15kg is placed on a smooth plane which is inclined at 60° to the horizontal. If the box is at rest,
calculate the normal reaction to the plane. [ Take g = 10m/s\(^2\) ]
129.9N
75N
60.0N
7.5N
Correct answer is B
Let the normal reaction be R
R = Wcosø = mgcosø
= 15 * 10cos 60°
= 150 * 0.5000
= 75N
Express \(\frac{4π}{2}\) radians in degrees....
Evaluate \(\lim \limits_{x \to 3} \frac{x^{2} - 2x - 3}{x - 3}\)...
Given that \(\tan x = \frac{5}{12}\), and \(\tan y = \frac{3}{4}\), Find \(\tan (x + y)\)....
If \(\int^3_0(px^2 + 16)dx\) = 129. Find the value of p...
If α and β are the roots of 3x\(^2\) - 7x + 6 = 0, find \(\frac{1}{α}\) +...
If \(8^{x} ÷ (\frac{1}{4})^{y} = 1\) and \(\log_{2}(x - 2y) = 1\), find the value of (x ...
A curve is given by \(y = 5 - x - 2x^{2}\). Find the equation of its line of symmetry....
A binary operation ♦ is defined on the set R, of real numbers by \(a ♦ b = \fr...