A particle of mass 2.5 kg is moving at a speed of 12 m/s....
A particle of mass 2.5 kg is moving at a speed of 12 m/s. If a force of magnitude 10 N acts against it, find how long it takes to come to rest.
1.5 s
3.0 s
4.0 s
6.0 s
Correct answer is B
F=ma
10=2.5a⟹a=4ms−2
Since it is a retarding movement, then a=−4ms−2.
v=u+at;v=0ms−1,u=12ms−1
0=12+(−4t)⟹0=12−4t
4t=12⟹t=3s
Find an expression for y given that dydx=x2√x...
If α and β are the roots of the equation 2x2−6x+5=0, evaluate \(\frac{...
Which of the following vectors is perpendicular to (−13)?...
A straight line 2x+3y=6, passes through the point (-1,2). Find the equation of the line. ...
The length of the line joining points (x,4) and (-x,3) is 7 units. Find the value of x. ...
Three forces F_{1} = (8 N, 300°), F_{2} = (6 N, 090°) and F_{3} = (4 N, 180°) ac...
Given that f(x) = 2x^{2} - 3 and g(x) = x + 1 where x \in R. Find g o f(x)....
Find the equation to the circle x^{2} + y^{2} - 4x - 2y = 0 at the point (1, 3)....