edexcel AS physics

[Assi1993]

hey everyone ..i hv these questions from the book..
(pg 47)
Q1: A hockey player passes the ball at 15m/s to a team mate who stops it completely at 0.1s.What force does the reciever's stick have to apply to the ball?

Q2:A penality stroke is flicked from a distance of 6.40m from the goal line.The striker scoops it so that the ball leaves the ground at 45degree angle at a speed of 8m/s.How long does the goal keeper has to make a save before the ball crosses the goal line?

[Deadly_king]

hey everyone ..i hv these questions from the book..
(pg 47)
Q1: A hockey player passes the ball at 15m/s to a team mate who stops it completely at 0.1s.What force does the reciever's stick have to apply to the ball?

Q2:A penality stroke is flicked from a distance of 6.40m from the goal line.The striker scoops it so that the ball leaves the ground at 45degree angle at a speed of 8m/s.How long does the goal keeper has to make a save before the ball crosses the goal line?

1. Is the question complete? I mean, it seems that something is lacking.

Can you please provide the answers as well?


2. So horizontal distance S from goal line = 6.40 m

The speed at 45^o is 8 ms^-1. Now you need to find the horizontal component of the speed which will be (8cos 45) = 5.66 ms^-1.

Speed = distance/time -----> Time taken for ball to reach goal line = 6.4/5.66 = 1.13s

[Assi1993]

oh hey
jazakAllah khair  for the second answer...
and umm...nothing is actually missing

[Deadly_king]

oh hey
jazakAllah khair  for the second answer...
and umm...nothing is actually missing

You're welcome.

Okay........I'll try it again later. Need to go now.

[M-H]

Hey Assi, the mass of the ball is given in one of the places where they're talking about the hockey thing. Its 0.14 kg Dead
Yeah, I am too lazy to type the solution...but I've provided King and he can show that to you

Sorry for the laziness ..King-thanks for being there so that we can burden you.

[ashish]

a=(v-u)/t
=(0-15)/0.1
=-150
this shows the deceleration

f=ma
=0.14*-150
=-21N

[Deadly_king]

Hey Assi, the mass of the ball is given in one of the places where they're talking about the hockey thing. Its 0.14 kg Dead
Yeah, I am too lazy to type the solution...but I've provided King and he can show that to you

Sorry for the laziness ..King-thanks for being there so that we can burden you.

That's what i was looking for.

Not very nice of you to burden a king like me

a=(v-u)/t
=(0-15)/0.1
=-150
this shows the deceleration

f=ma
=0.14*-150
=-21N

Here is your solution Assi.

Thanks for your precious help ashish. 

+rep

[ashish]

That's what i was looking for.

Not very nice of you to burden a king like me

Here is your solution Assi.

Thanks for your precious help ashish. 

+rep

always here to help