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Sahay Sir > Question Answers > NCERT Exemplar Class 11 > Physics > Chapter 4 - Laws of Motion > Mass m1 moves on a slope making an angle θ with the horizontal and is attached to mass m2 by a string passing over a frictionless pulley as shown in Fig. 5.2. The co-efficient of friction between m1 and the sloping surface is μ.Which of the following statements are true?

Mass m1 moves on a slope making an angle θ with the horizontal and is attached to mass m2 by a string passing over a frictionless pulley as shown in Fig. 5.2. The co-efficient of friction between m1 and the sloping surface is μ.Which of the following statements are true?

A cricket ball of mass 150 g has an initial velocity (3iˆ+ 4jˆ)ms^−1 and a final velocity v =−(3iˆ+4jˆ)ms^−1 after being hit. The change in momentum (final momentum initial momentum) is (in kg ms^−1)