Question

Suppose you studied the velocity of a cheetah overtime after it starts running to chase an deer. After the linear fit, a spreadsheet program gives you an equation y = 2.2 x + 1.2. You know from physics class that velocity and time can be modeled by the equation v = v0 + at. In this equation, v is velocity after time t, v0 is the velocity at zero time and a is acceleration during the same time interval. According to this model, what does the number 2.2 represents in the equation given by Excel? Group of answer choices Velocity after t. Velocity at t = 0 We cant tell without knowing what was plotted on the horizontal and vertical axes. Acceleration

Answer 1

Explanation:

While studying the velocity of a cheetah over time in a spreadsheet program is given by :

y = 2.2 x + 1.2 ...(1)

We know that,

v=v₀+at ...(2)

v₀ is velocity when t = 0, v is velocity after time t, a is acceleration and t is time.

If we consider time t on x-axis and v on y axis, then only we can draw a plot of equation (2). On comparing equation (1) and (2) we get :

a = 2.2 (but it is not correct as we don't know about axes).

Hence, the correct option is (a) "We cant tell without knowing what was plotted on the horizontal and vertical axes"