Question

Aisha dropped an object of mass 4kg from a height of 10m.the object has a speed of 0m/s at position A and is at a height of 10m above the ground .At position B ,the object is 6m above the ground .At position C the object 4m above the ground .At point D,the object is mere picimeter (almost at 0 meter height)above the ground .Assume negligible air resistance throughout the motion.use this information to fill in the blanks (g=10/s)​

Answer 1

Explanation:

10)

Aisha dropped an object of mass 4 Kg from a height of 10m.

A

The object has a speed of 0 m/s at position A and is at a height

of 10m above the ground. At position B, the object is om above

B

the ground. At position C, the object is 4m above the ground.

At point D, the object is mere picometer ( almost at 0 meter height)

C

above the ground. Assume negligible air resistance throughout

the motion. Use this information to fill in the table. (g=10m/s2)

D

Answer 2

Given :-  

The object has a speed of 0 m/s at position A and is at a height  

A  of 10m above the ground.  

 

To find :-  

Velocity & time taken to reach at B , C & D  

Solution :-  

At  t = 0    position  A  - 10 m above ground    velocity =  0  

PE = mgh = 4 * 10 * 10 = 400 Joule

KE =(1/2)mv² = 0

At position B  - 6 m above ground distance covered  (10 - 6) = 4 m

S = ut + (1/2)at²  

u = 0

a = g = 10

=> 4 = (1/2)(10)t²

=> t = √0.8  =  0.9 sec

V = U  + at   =  9 m/s

PE = 4 * 10 * 6 ≈ 240 joule  

KE = 400 - 240 ≈ 160 Joule

At position C  - 4 m above ground distance covered  (10 - 4) =6 m

S = ut + (1/2)at²  

u = 0

a = g = 10

=> 6 = (1/2)(10)t²

=> t = √1.2  ≈ 1.1 sec

V = U  + at   ≈  11 m/s

PE = 4 * 10 * 4 = 160 joule

KE = 400 - 160 = 240 Joule

At position D  - 0 m above ground distance covered  (10 - 0) =10 m

S = ut + (1/2)at²

u = 0

a = g = 10

=> 10 = (1/2)(10)t²

=> t = √2  = 1.4 sec

V = U  + at   =  14 m/s

PE = 4 * 10 * 0 =  0 joule  

KE = 400  Joule

 

Position  Distance from ground  PE    KE     Time         Velocity

A                   10 m                        400   0        0  s             0 m/s

B                   6 m                          240  160     0.9 s           9 m/s

C                   4 m                          160   240     1.1 s            11 m/s

D                   0 m                          0       400    1.4 s           14 m/s  

 

Thanks me

Mark me as brainliest :-)

Rate my answers ;)  

click here and here  

(♥THANKS)      ⭐⭐⭐⭐⭐