Position, velocity, and acceleration Quiz 1

Question 1

If $$s(t)=3{{t}^{3}}-4{{t}^{2}}+5$$ , then what is the velocity at $$t=2$$ ?

Accepted Answer

$$25m.{{s}^{-1}}$$

Answer

$$20m.{{s}^{-1}}$$

Answer

$$30m.{{s}^{-1}}$$

Answer

$$49m.{{s}^{-1}}$$

Question 2

If $$s(t)$$ be the position of an object $$s(t)=4{{t}^{3}}-2{{t}^{2}}+7t$$ . What is the value of acceleration at $$t=3$$ ?

Accepted Answer

$$68m.{{s}^{^{-2}}}$$

Answer

$$50m.{{s}^{-2}}$$

Answer

$$70m.{{s}^{-2}}$$

Answer

$$65m.{{s}^{-2}}$$

Question 3

What is the acceleration when the slope is constant in position - time graph ?

Accepted Answer

Acceleration is zero.

Answer

Acceleration is decreasing

Answer

Acceleration is increasing

Answer

Acceleration is constant.

Question 4

If $$s(t)$$ be the position of an object $$s(t)=2{{t}^{3}}-8{{t}^{2}}+35t$$ . What is the velocity at $$t=1$$ ?

Accepted Answer

$$v=25m.{{s}^{-1}}$$

Answer

$$v=16m.{{s}^{-1}}$$

Answer

$$v=20m.{{s}^{-1}}$$

Answer

$$v=8m.{{s}^{-1}}$$

Question 5

If $$s(t)$$ be the position of an object $$s(t)={{t}^{3}}-4{{t}^{2}}+8t$$ . What is the value of acceleration at $$t=3$$ ?

Accepted Answer

$$a=10m.{{s}^{-2}}$$

Answer

$$a=16m.{{s}^{-2}}$$

Answer

$$a=-4m.{{s}^{-2}}$$

Answer

$$a=-8m.{{s}^{-2}}$$