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mafiozo [28]
3 years ago
15

a car advertisement States that a certain car can accelerate from rest to70km/h in 7seconds find the car's average acceleration​

Physics
1 answer:
Aneli [31]3 years ago
8 0

Answer:

<u>Acceleration</u><u> </u><u>is</u><u> </u><u>2</u><u>.</u><u>7</u><u>8</u><u> </u><u>m</u><u>/</u><u>s²</u>

Explanation:

Since the car is from rest, initial velocity, u is zero.

from first newton's equation of motion:

{ \bf{v = u + at}} \\

v is final velocity

u is initial velocity

a is acceleration

t is time

70 km/h is (70 × 1000 ÷ 3600) m/s = 19.44 m/s

{ \sf{19.44 = 0 + (a \times 7)}} \\ { \sf{7a = 19.44 }} \\ { \sf{a = 2.78 \:  {ms}^{ - 2} }}

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3 0
4 years ago
A spring-mounted chair in which the astronaut sits, can be used to find the mass of an astronaut. The chair is then made to osci
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Answer:

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4 0
4 years ago
The nose of an ultralight plane is pointed south, and its airspeed indicator shows 28 m/s . the plane is in a 18 m/s wind blowin
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6 0
4 years ago
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