Question

8. Fig. 5.12 shows an estimated force-time graph for a
base ball struck by a bat.
as?
B
18000
Force (N) ->
Z
12000
vith a
at the
6000
1. The
e ball.
on the
C С
2.5 3
0
1
180 N)
1.5 2
Time (s)-
Fig. 5.12
eed of
10 cm
nail,
ET) the
Ise.
From this curve, determine (1) impulse delivered to
the ball (ii) force exerted on the ball (iii) the
maximum force on the ball.​

Answer 1

Answer:

(i) : Area under the F-t graph gives the impulse delivered to the ball.

Impulse   J=  1/2  ×18000×1.5

                 =13500 Ns

(ii) :  Force exerted on the ball    F=  J/Δt

=  13500 /1.

​  =9000 N

(iii) : Maximum force exerted on the ball is  18000 N

Answer 2

The Figure is shown below .

From figure ,

(1) Area under the F-t graph gives the impulse delivered to the ball as we know that :

Impulse is given by  J=  $\frac{1}{2}$  ×18000×1.5

                                     =13500 Ns

(2)  Force exerted on the ball    F=  J/Δt

                                                          =  $\frac{13500}{1.5}$  (Δt = 1.5 sec)

                                                           =9000 N

(3) From the given figure , it is easily known that the maximum force exerted on the ball is  18000 N