alleryA $2\,\text{kg}$ block is pulled upward vertically with acceleration $2\,\text{m s}^{-2}$. Taking $g = 10\,\text{m s}^{-2}$, what is the tension in the string?
A$16\,\text{N}$
B$20\,\text{N}$
C$24\,\text{N}$
D$40\,\text{N}$
Answer & Solution
Correct answer: C. $24\,\text{N}$
For upward acceleration, $T - mg = ma$.
Hence $T = m(g+a) = 2(10+2) = 24\,\text{N}$.
**So option C is correct.**
Keep practising Laws of Motion
Browse all Laws of Motion questions for AP Intermediate 1st Year, or explore more Physics topics.
Related questions
A constant force of 6 N acts for 4 s on a 2 kg body initially at rest. The kinetic energy A stone of mass 0.5 kg is whirled in a horizontal circle of radius 1 m at constant angularA car of mass 1000 kg accelerates from rest to 20 m s⁻¹ in 5 s on a level road. The net hoA force F acts on a particle making an angle θ with its instantaneous velocity. The componNewton's second law is often written as F = m a. This form is strictly valid when:A batsman hits a 0.15 kg ball back along the line of approach without changing its speed oMomentum p of a body of mass m moving with velocity v is defined as:The SI unit of force, the newton, is defined as the force that: