The x-component of vector R is Rx = −28.2 units and its y-component is Ry = 19.6 units. What are its magnitude and direction? Gi ve the direction as an angle measured counterclockwise from the +x-direction.
1 answer:
Answer:
Explanation:
Rx = -28.2 units
Ry = 19.6 units
magnitude of R = √ [( - 28.2 )² + ( 19.6 ) ]
= √ ( 795.24 + 384.16 )
= 34.34 units
If θ be the angle measured counterclockwise from the +x-direction
Tanθ = 19.6 / - 28.2 = -0.695
θ = 180 - 34.8
= 145.2° .
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Given: Mass m = 44 Kg; Velocity v = 10 m/s Required: Kinetic energy K.E = ? Formula: K.E = 1/2 mv² K.E 1/2 (44 Kg)(10 m/s)² K.E = 2,200 Kg.m²/s² K.E = 2,200 J Answer is A
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