Trigonometric EquationHard

Question

An explosion breaks a rock into three parts in a horizontal plane. Two of them go off at right angles to each other. The first part of mass 1 kg moves with a speed of 12 ms-1 and the second part of mass 2 kg moves with 8 ms-1 speed. If the third part files off with 4 ms-1 speed, then its mass is :-

Options

A.17 kg
B.3 kg
C.5 kg
D.7 kg

Solution


                            

From conservation of momentum
    
    ⇒    m = 5kg.

Create a free account to view solution

View Solution Free
Topic: Trigonometric Equation·Practice all Trigonometric Equation questions

More Trigonometric Equation Questions

If tan θ = - , then sin θ is...Exact value of tan 200o (cot 10o − tan 10o) is-...If sin A, cos A and tan A are in G.P., then cos3A + cos2A is equal to-...Let tan-1 y = tan-1 x + tan-1 , where |x| < . Then a value of y is :...The expression can be written as...