A body of mass m-2kg is initially at position, r--(1+2)) and moves with an Initial velocity, v, -(-4+21) and an acceleration, a=(1+21) where g-10m/s and r-3s are two constant parameters having dimensions of acceleration and time respectively. Question 1. Find the unit vector of the initial position vector. (Hint: unit vector of A-AP 10(-21) B)(1+21) C) (1+1) D) (+21) E)+(24+1) Question 2. Find the distance between the origin of the coordinate frame and the initial position of the body. A)150m B)60m C)305m D)602m E)300/3m Question 3. Find the unit vector of the initial velocity. 4)(-1+21) B) (+21) C(+1) D) (+21) E) (21+1) Question 4. Find the initial speed of the body. 4)10/5m/s B)5/10m/s C)303m/s D)155m/s E)455m/s Question 5. Find the angle a between the acceleration and the initial velocity of the body. A) arccos(1/5) B) arccos(3/5) C) arccos(1/3) D) arccos(-1/3) E)90 Question 6. Find the velocity of the body at time =3s. A)40jm/s B)20[-i+2j]m/s C)20[-ilm/s D)40[-i+j]m/s E)20[-2i+j]m/s Question 7. Find the position vector of the body at time t=3s. A)15[i+6j]m B)15[i+2j]m C)15[-i+6j]m D)45[-i+2j]m E)15[-3i+2j]m AB Question 8. Find the impulse of the force acting on the body during the time interval Ar= (0-3s) A)I=10(i+2j) N s B)I=20(i+2j) N-s C)I=5(-i+2j) Ns D)I=8(-i+2j) N-SE)I 48(-i+2j Question 9. Find the work done on the body during the time interval At = (0-3s). A)W=1250J B)W=2500J C)W=1100J D)W=3000J E)W=1500J