The velocity of a 140 gram ball changes from < 7, −7, 0 > m/s to < 7.3, −7.4, 0 > m/s in 0.07 s, due to the gravitational attraction of the Earth and to air resistance. (a) What is the acceleration of the ball?

Complete question:

The velocity of a 140 gram ball changes from < 7, −7, 0 > m/s to < 7.3, −7.4, 0 > m/s in 0.07 s, due to the gravitational attraction of the Earth and to air resistance.

(a) What is the acceleration of the ball?

(b) What is the rate of change of momentum of the ball?

(c) What is the net force acting on the ball?

Part (i) the acceleration of the ball is 10m/s²

Part(ii) the rate of change of momentum of the ball is 1.4N

Part (iii) the net force acting on the ball is 0.028 N

Explanation:

Given;

mass of the ball = 140 g = 0.14 kg

change in initial velocity of the ball, u = (7.3 - 7) m/s = 0.3 m/s

change in final velocity of the ball, v =  ( -7.4 + 7) m/s = -0.4 m/s

time of motion = 0.07s

Part (i) the acceleration of the ball

a = Δv/t

Part(ii) the rate of change of momentum of the ball

From newton's second law of motion; "rate of change of momentum is directly proportional to the applied force.

Part (iii) the net force acting on the ball

true is the correct answer

hope i

the following is queen elizabeth’s purposes:

- to encourage the parliament that the technique of picking successors to the seat based merely on birthright needs to be reviewed.

- (not) to convince the parliament that her kid should not be measured as a likely choice for heir to the english power.

- to persuade the parliament that merely since she has a child does not assure that the kid will be a capable leader.

- to sway the parliament how shattering it could be if they proceeded discourteously concerning her or her child.