Question

tell me answer don't spam. ​

Answer 1

Given

• Mass = 500 g
• Initial Velocity = 54 km/h
• Final Velocity = 0 m/s
• Time = 6 sec

Solution

● v = u + at

● F = ma

● Here we should first convert the units, the initial velocity should be converted to m/s and the mass of the body has to be changed to kg

✭ Converting Units :

• Mass = 500 g = 500/1000 = 0.5 kg

• Initial Velocity = 54 km/h = 54 × 5/18 = 3 × 5 = 15 m/s

✭ Acceleration of the body :

→ v = u + at

→ 0 = 15 + a × 6

→ 0-15 = 6a

→ -15 = 6a

→ -15/6 = a

→ Acceleration = -2.5 m/s²

✭ Force Applied :

→ F = ma

→ F = 0.5 × (-2.5)

→ F = -1.25 N

• Note that here the force would be against the motion and hence is -ve.

∴ Answer to the question is Option B

Answer 2

Answer:

option no. (3) -5/2

it is correct ans

Explanation:

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