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Forces of 3.0 N and 4.0 N act at right angles on a block. What should be the mass of the block for the acceleration to be 7 m/s2? |
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Answer» :Two FORCES of 3N and 4N act at right angles on a block.Acceleration of block = 7m/s²We have to find mass of block★ First of all we need to find net force acts on the block. If two forces A and B act at right angles on a BODY then resultant force R is given byR² = A² + B²By substituting the values,➝ R² = A² + B²➝ R² = 3² + 4²➝ R = √25➝ R = 5N★ As per newton's second law of motion, force is measured as the product of mass and acceleration. F = m a➝ F = m a➝ 5 = m × 7➝ m = 5/7➝ m = 0.71 kg |
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