/3 Mickey He hits the puck when it has an initial velocity of 3.5 m/s [East]. The stick touches the puck for 0.250

Question

/3
Mickey He hits the puck
when it has an initial
velocity of 3.5 m/s [East].
The stick touches the puck
for 0.250 seconds and
changes the velocity to
6.75 m/s [East]. What is
the acceleration? show
your work below
Question 2
13
Matt plays badminton. He
serves the birdie with a
velocity of 4.25 m/s [right]
covering a displacement of
5.2 m [forward]. How much
time does this birdie’s trip
take? show your work
below
​

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Khánh Gia 1 year 2021-09-04T05:56:10+00:00 1 Answers 0 views 0

Answers ( )

  1. thanhcong
    0
    2021-09-04T05:58:08+00:00
    Reply

    Answer:

    130m/s^2 and 1.22s

    Explanation:

    From V = u+at

    Where V, u, a, and t are the final velocity, initial velocity, acceleration and time respectively.

    v = 6.75m/s

    u = 3.5m/s

    t = 0.250secs

    a = ?

    V = u+at

    6.75= 3.5+a(0.250)

    6.75-3.5 = 0.250a

    3.25=0.250a

    Divide both sides by 0.250

    3.25/0.250= 0.250a/0.250

    a = 130m/s^2

    The acceleration of the will be 130 meter per second

    Question 2

    Speed = distance/time

    Given that speed= 4.25m/s

    Distance = 5.2m and time = ?

    4.25m/s = 5.2m/t

    Cross multiply

    4.25×t = 5.2

    Make t the subject by dividing both sides by 4.25

    4.25t/4.25 = 5.2/4.25

    t = 1.22s

    Hence the time taken will be 1.22 seconds

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