Question

4) If a vector has components Ay>0, and Ay<0, then the angle that this vector makes with the positivex-axis must be in the range A) 180° to 270° B) 270° to 360° C) 0° to 90° D) 90° to 180° E) cannot be determined without additional information 5) 5) When is the average velocity of an object equal to the instantaneous velocity? A) never B) only when the velocity is increasing at a constant rate C) only when the velocity is decreasing at a constant rate D) when the velocity is constant E) always 6) If the velocity of an object is zero at some point then its acceleration must also be zero at that point A) True B) False

Answer 1

then anerage 4 Y Axxo and Aytothea so, It is in 4th quadrant 0 so, o must be in the range 270° to 360 5 When the relocity to is constant velocity of an object instaneous recocity. equal hal to the Varga toral displacement total tina slt Vinstentaneous ds 1. ds it vo o is const. dravo (ds=fvodt pas=st volt S=bot 4+2VO s = total disp. t= total time therefore, Ilta varga No. false. Because. When to hall is at heighest point then ve o but accelaration is heighest for a ball thrown upw and