Physics AS levels Multiple Choice Help!

Watch this thread
This discussion is closed.
physicshelp1
Badges: 2
Rep:
? You'll earn badges for being active around the site. Rep gems come when your posts are rated by other community members.
#1
Report Thread starter 8 years ago
#1
A lead pellet is shot vertically upwards into a clay block that is stationary at the moment of impact
but is able to rise freely after impact.
The pellet hits the block with an initial velocity of 200ms–1. It embeds itself in the block and does not emerge.
How high above its initial position will the block rise?
(Mass of pellet = 5.0g; mass of clay block = 95g.)

How do i calculate it? please help with all steps.

Correct answer is 5.1 m but i dont know how to get it.
0
usycool1
Badges: 19
? You'll earn badges for being active around the site. Rep gems come when your posts are rated by other community members.
#2
Report 8 years ago
#2
(Original post by physicshelp1)
A lead pellet is shot vertically upwards into a clay block that is stationary at the moment of impact
but is able to rise freely after impact.
The pellet hits the block with an initial velocity of 200ms–1. It embeds itself in the block and does not emerge.
How high above its initial position will the block rise?
(Mass of pellet = 5.0g; mass of clay block = 95g.)

How do i calculate it? please help with all steps.

Correct answer is 5.1 m but i dont know how to get it.
First use the principle of conservation of momentum to find the final velocity of the block and the pellet.

Then use SUVAT (you have the initial speed, final speed and acceleration...you need to find s, the displacement) to get your answer.
1
eagleeye1990s
Badges: 0
Rep:
? You'll earn badges for being active around the site. Rep gems come when your posts are rated by other community members.
#3
Report 8 years ago
#3
Please Can Anyone help me in this question Using steps, In finding
0
eagleeye1990s
Badges: 0
Rep:
? You'll earn badges for being active around the site. Rep gems come when your posts are rated by other community members.
#4
Report 8 years ago
#4
(Original post by usycool1)
First use the principle of conservation of momentum to find the final velocity of the block and the pellet.

Then use SUVAT (you have the initial speed, final speed and acceleration...you need to find s, the displacement) to get your answer.
Please Can Anyone help me in this question Using steps, In finding
0
Saisubu99
Badges: 3
Rep:
? You'll earn badges for being active around the site. Rep gems come when your posts are rated by other community members.
#5
Report 6 years ago
#5
Momentum before collision = mu + m(0) = (5/1000) x 200 = 1
Momentum after collision = (m+m) x v = 0.1 x v
Conservation of momentum 1 = 0.1vv = 10 ms-1
v^2 = u^2 + 2as
v = 10
a =g = 9.81
u = 0
s= ?
10^2 = 0 + 2x9.81xs
S = 10^2/ (2x9.81)
S = 5.09 = 5.1
2
Manahil01
Badges: 7
Rep:
? You'll earn badges for being active around the site. Rep gems come when your posts are rated by other community members.
#6
Report 3 years ago
#6
Why did you use 0.1 instead of the 0.095 kg
0
mallikabomjan
Badges: 5
Rep:
? You'll earn badges for being active around the site. Rep gems come when your posts are rated by other community members.
#7
Report 3 years ago
#7
it is because
m+m=2m

95+5 =100g=0.1 kg
1
Eimmanuel
Badges: 13
Rep:
? You'll earn badges for being active around the site. Rep gems come when your posts are rated by other community members.
#8
Report 3 years ago
#8
(Original post by Manahil01)
Why did you use 0.1 instead of the 0.095 kg
(Original post by mallikabomjan)
it is because
m+m=2m

95+5 =100g=0.1 kg
Hi, this has been an old thread, if possible, start a new thread to ask your question. Thanks.

By the way, to Manahil01, a warm welcome to TSR.
1
X
new posts
Back
to top
Latest
My Feed

See more of what you like on
The Student Room

You can personalise what you see on TSR. Tell us a little about yourself to get started.

Personalise

Year 12s - where are you at with making decisions about university?

I’ve chosen my course and my university (9)
45%
I’ve chosen my course and shortlisted some universities (5)
25%
I’ve chosen my course, but not any universities (2)
10%
I’ve chosen my university, but not my course (0)
0%
I’ve shortlisted some universities, but not my course (0)
0%
I’m starting to consider my university options (3)
15%
I haven’t started thinking about university yet (0)
0%
I’m not planning on going to university (1)
5%

Watched Threads

View All