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#### karush

##### Well-known member

- Jan 31, 2012

- 2,724

(a) How fast is the care going at $t=1\, s$?

$$v_t=v_0+at=45+10(1)=55\,\dfrac{km}{h}$$

at $t=2\,s$

$$v_t=v_0+at=45+10(2)=45+20=60\,\dfrac{km}{h}$$

(b) What is its speed at a general time t

ok this is a very simple problem but when you have constant acceleration there is no power on s?

also (b) what is meant by general time t is that an average or an equation.

also typos perhaps...