3 years ago

Theweight ofof body is 420N .Calculate its mass

Physics

1 answer:

Nady [450]3 years ago

6 0

Answer:

42.87

Explanation:

Google

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420/9.8 which equals 42.87.

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a car is moving 8.80 m/s when it begins to accelerate at 2.45 m/s^2. how much time does it take to trav 138m. please help me (':

Ulleksa [173]

Answer:

7.6 s

Explanation:

Considering kinematics formula for final velocity as

$v^{2}=u^{2}+2as$

Where v and u are final and initial velocities, a is acceleration and s is distance moved.

Making v the subject then

$v=\sqrt{u^{2}+2as}$

Substituting 8.8 m/s for u, 138 m for s and 2.45 m/s2 for a then

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Also, v=u+at and making t the subject of the formula

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Substituting 27.45 m/s for v, 8.8 m/s for u and 2.45 m/s for a then

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Therefore, it needs 7.6 seconds to travel

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3 years ago

Theweight ofof body is 420N .Calculate its mass​

Theweight ofof body is 420N .Calculate its mass