12) a plot of v versus t for a free falling object is a straight line of negative slope with
v(t=0)>0. The line crosses the t axis at time t1. which of the following statements is true?
a) the object was released from rest at the top of a cliff.
b) the object was thrown downward from the top of a cliff.
c) the object hits the ground at time t1.
d) the object reaches its maximum height at time t1.
13) When a vector B is subtracted from the vector given by Ax = 3, Ay=4, the resulting vector points in the positive x direction and has magnitude equal to that of A. The magnitude of B is
a) 4.2
b) 6.1
c) 0
d) 5
i think the first one is B but i am not sure.. please help me with theses 2 problems.. i would appreciate it ..
thanks
v(t=0)>0. The line crosses the t axis at time t1. which of the following statements is true?
a) the object was released from rest at the top of a cliff.
b) the object was thrown downward from the top of a cliff.
c) the object hits the ground at time t1.
d) the object reaches its maximum height at time t1.
13) When a vector B is subtracted from the vector given by Ax = 3, Ay=4, the resulting vector points in the positive x direction and has magnitude equal to that of A. The magnitude of B is
a) 4.2
b) 6.1
c) 0
d) 5
i think the first one is B but i am not sure.. please help me with theses 2 problems.. i would appreciate it ..
thanks