A motorcycle has a constant acceleration of 3.49 m/s2. Both the velocity and acceleration of the motorcycle point in the same direction. How much time is required for the motorcycle to change its speed from (a)29.0 to 39.0 m/s, and (b)59.0 to 69.0 m/s?

(a)2.865 s

(b)2.865 s

Explanation:

We are given that

Acceleration,a=

a.Initial speed,u=29 m/s

Final speed,v=39 m/s

We know that

Using the formula

b.Initial speed,u=59 m/s

Final speed,v=69 m/s

Again using the formula

the only real purpose of sputnik 1 was to beat the us into space. we were getting close to launching a useful satellite, explorer 1 - which launched on january 31, 1958. the ussr had to beat that, so they launched sputnik 1 on october 4, 19