(A)25J (B)20J (C)5J (D)10J Figure -1 11) piece moves East at 4m/s and the 6kg piece moves South at 2m/s. Find the speed and direction of the 4kg piece. A 12kg object, originally at rest, suddenly explodes in to three masses : 2kg, 4kg, and 6kg. The 2kg (A)V3 = 3.6m/s & 56° above the x- axis (B)V3 =3.6m/s &116° above the x - axis. 12) At certain instant, a particle experience a force F = (5i +6j + 2k)N while having a velocity = (2i -3k)m/s. What is the instantaneous rate at which the force does work on the particle? (C)V3 =3.6m/s & 26° above the x - axis. (D)None of the above (A)4W (B)50W (C)13 W. (D) 10W. 13) A worker pushes a wheelbarrow with a horizontal force of 50 N on level ground over a distance of 5m. If a friction force of 43 N acts on the wheelbarrow in a direction opposite that of the worker, what net work is done on the wheelbarrow by the worker? (A) 35 J (B)215 J (C) 250 J (D) 10 J

(A)25J (B)20J (C)5J (D)10J Figure -1 11) piece moves East at 4m/s and the 6kg piece moves South at 2m/s. Find the speed and direction of the 4kg piece. A 12kg object, originally at rest, suddenly explodes in to three masses : 2kg, 4kg, and 6kg. The 2kg (A)V3 = 3.6m/s & 56° above the x- axis (B)V3 =3.6m/s &116° above the x - axis. 12) At certain instant, a particle experience a force F = (5i +6j + 2k)N while having a velocity = (2i -3k)m/s. What is the instantaneous rate at which the force does work on the particle? (C)V3 =3.6m/s & 26° above the x - axis. (D)None of the above (A)4W (B)50W (C)13 W. (D) 10W. 13) A worker pushes a wheelbarrow with a horizontal force of 50 N on level ground over a distance of 5m. If a friction force of 43 N acts on the wheelbarrow in a direction opposite that of the worker, what net work is done on the wheelbarrow by the worker? (A) 35 J (B)215 J (C) 250 J (D) 10 J