# Ch 2.1 Help ## Ch 2.1 Help

I will fill in the blanks as answers get solved but seeing as this is old I doubt anybody needs them.

Question 1: (1 point)

An object travels from a position 343.7 cm to 788.5 cm with an average velocity of 1.055 m/s. How many seconds does the trip last (see sheet 3 , 3')?

How to solve:

Question 2: (1 point)

The position vs time graph of an object moving with constant speed is described by x=3.454 t with position x and time t in SI units. Give the value of the constant velocity in SI units. Indicate with a negative (positive) sign of your result whether the average velocity in this case is equal (is not equal) to the instantaneous velocity (see sheets 5).

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Question 3: (1 point)

The position x of an object as a function of time is given as x = 3 + 3.821 t + 3.307 t2 . All quantities are understood to be quoted in SI units. Calculate the position of the object at 2.886 s (see sheet 7).

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Question 4: (1 point)

The position x of an object as a function of time is given as x = 3 + 3.847 t + 2.811 t2. All quantities are understood to be quoted in SI units. Calculate the instantaneous velocity of the object at 20.28 s (see sheets 5,click 5'',6,9, see sheet 7 in the calculus chapter).

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