Upcoming SlideShare
×

# Gravity mass weight

1,005 views

Published on

1 Like
Statistics
Notes
• Full Name
Comment goes here.

Are you sure you want to Yes No
• Be the first to comment

Views
Total views
1,005
On SlideShare
0
From Embeds
0
Number of Embeds
124
Actions
Shares
0
91
0
Likes
1
Embeds 0
No embeds

No notes for slide

### Gravity mass weight

1. 1. Gravity
2. 2. Gravity   •  Earth’s  gravity  pulls  objects  toward  the  center   of  the  Earth  and  gives  them  weight.   •  Weight  is  a  force  measured  in  Newtons  (N).
3. 3. Newtons   •  Newtons  are  named  a@er  Sir  Isaac  Newton.   •  On  Earth  every  kilogram  of  mass  is  pulled   down  by  gravity  with  a  force  of  10  N.
4. 4. Gravity   •  Other  planets  also  have  gravity  but  the  size  of   the  gravity  may  be  diﬀerent  from  the  Earth.   •  Objects  weigh  more  where  the  gravity  is   bigger.
5. 5. Gravity   •  Gravity  is  an  invisible  force.    It  holds  you  onto   the  Earth.   •  It  speeds  you  up  when  you  cycle  downhill   •  It  pulls  you  back  when  you  cycle  uphill
6. 6. Gravity   •  It  makes  everything  fall  to  the  ground   •  It  holds  the  Moon  in  its  orbit  around  the   Earth,  and  the  Earth  in  orbit  around  the  Sun.   •  You  cannot  see  it,  but  you  can  observe  its   eﬀects
7. 7. Gravity   •  Gravity  is  a  pulling  force.    It  never  pushes.   •  The  pull  is  always  in  a  straight  line  towards  the   center  of  the  Earth.
8. 8.
9. 9. Mass   •  Like  all  objects  you  have  mass.   •  Mass  tells  you  how  much  material  is  in  your   body.   •  Mass  is  measured  in  grams  (g)  or  in  kilograms   (kg).
10. 10. Weight   •  Mass  is  o@en  confused  with  weight.   •  Weight  tells  you  how  strong  the  force  of   gravity  is  pulling  on  your  mass.   •  Weight  is  a  force  and  is  measured  in  Newtons   (N).
11. 11. Mass  &  Weight   •  What  happens  to  your  mass  and  weight  on   the  moon?   •  The  mass  of  an  object  NEVER  changes  no   maRer  where  you  take  it.
12. 12. Mass  &  Weight   •  If  your  mass  on  Earth  was  50  kg,  your  mass  on   the  moon  would  remain  the  same  at  50kg.   This  is  because  you  are  sTll  made  of  the  same   about  of  material.   •  Your  weight  on  the  moon  would  be  diﬀerent,   because  the  force  of  gravity  on  the  moon  is   diﬀerent.
13. 13. Weight   •  Given    the  force  of  gravity  is  one-­‐sixth  of  that   of  the  earth,  your  weight  would  be:   •  500  N  divided  by  6  =  83.3  N
14. 14. •  Explain  what  gravity  is.   •  Explain  in  your  own  words  the  diﬀerence   between  mass  and  weight.   •  Jupiter  has  a  gravity  pull  which  is  2.5   Tmes  greater  than  on  Earth.    Mr  Stace’s   mass  is  80  kg.    What  is  his  mass  and   weight  on  the  surface  of  Jupiter.