Question
Displacement is given by $x=5+10 t+5 t^2$. Find the value of instantaneous acceleration.

Answer

 Instantaneous acceleration $(a)=\frac{d^2 x}{d t^2}$$
\frac{d x}{d t}=0+10 \times 1+5 \times 2 t=10+10 t$
$
\therefore \quad \frac{d^2 x}{d t^2}=0+10 \times 1=10
$
Instantaneous acceleration
$
(a)=10
$

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Similar questions

Write the dimension of modulus of elasticity?
Why a body weighs more at poles and less at equator?
A sphere of radius 1.00cm is placed in the path of a parallel beam of light of large aperture. The intensity of the light is $0.5W/cm^{-2}$. If the sphere completely absorbs the radiation falling on it, find the force exerted by the light beam on the sphere.
If force is acting on a moving body perpendicular to the direction of motion, then what will be its effect on the speed and direction of the body?
A steel wire of cross-sectional area $0.5 \mathrm{~mm}^2$ is held between two fixed supports. If the wire is just taut at $20^{\circ} \mathrm{C}$, determine the tension when the temperature falls to $0^{\circ} \mathrm{C}$. Coefficient of linear expansion of steel is $1.2 \times 10^{-5}{ }^{\circ} \mathrm{C}^{-1}$ and its Young's modulus is $2.0 \times 10^{11} \mathrm{~N} \mathrm{~m}^{-2}$.
Is a force required to maintain a body in its state of uniform motion along a straight line?
Every SHM is periodic motion, but every periodic motion need not to be a simple harmonic motion. Do you agree? Give an example to justify your statement.
The density of oxygen is 16 times the density of hydrogen. What is the relation between the speeds of sound in two gases?
Can we determine the mass of a satellite by measuring its time period?
When the pressure on a sphere is increased by 80 atmospheres, then its volumes decreases by 0.01%. Find the bulk modulus of elasticity of the material of sphere.