Answer:
Explanation:
Given
-- Mass of the boy
-- Mass of the girl
-- Acceleration of the girl towards the boy
Required
Determine the acceleration of the boy towards the girl ()
From the question, we understand that the surface is frictionless. This implies that the system is internal and the relationship between the given and required parameters is:
Substitute values for and
Make the subject
<em>Hence, the acceleration of the boy towards the girl is 1.446m/s^2</em>
Answer:
60000 N
Explanation:
Neglecting air resistance,
Using equation Net force = mass x acceleration (F=ma),
F = 12000 x 5
F = 60000 N
Answer:
Explanation:
Let velocity of helium atom before the collision be v and velocity of oxygen atom be V
Applying the law o conservation of momentum along the line of collision
6.646 x 10⁻²⁷v + 0 = 6.646 x 10⁻²⁷ x 6.636×10⁶ cos 84.7 + 2.656 x 10⁻²⁶ V cos40.4
6.646 x 10⁻²⁷v + 0 = 4.07 x 10⁻²¹ + 2.02 x 10⁻²⁶ V
6.646 x 10⁻⁻²⁷ v = 4.07 x 10⁻²¹ + 2.02 x 10⁻⁻²⁶ V
Applying law of conservation of momentum in a direction perpendicular to original direction of motion
6.646 x 10⁻²⁷ x 6.636×10⁶ sin 84.7 - 2.656 x 10⁻²⁶ V sin40.4 = 0
43.91 x 10⁻²¹ = 1.7214 x 10⁻²⁶V
V = 43.91 / 1.7214 x 10⁵ m /s
= 25.5 x 10⁵ m /s
Putting this value in the earlier equation
6.646 x 10⁻⁶ v = 4.07 x 10⁻²¹ + 2.02 x 10⁻⁵ V
6.646 x 10⁻⁶ v = 4.07 x 10⁻²¹ + 2.02 x10⁻²⁶ x 25.5 x 10⁵
6.646 x 10⁻²⁷ v = 4.07 x 10⁻²¹ + 51.51 x10⁻²¹ = 55.58 x 10⁻²¹
v = 55.58 x 10⁻²¹ / 6.646 x 10⁻²⁷
= 8.36 x 10⁶ m /s
Answer:
5 minutes ago A bird flies 6km east, then 4km west. Find the total distance traveled and displacement (d) after this flight. Find the total distance traveled and displacement (d) after this flight.
Explanation:
<u> Focal Length of the lens is 3.846 cm.</u>
Explanation:
Image Distance ( i ) = 4 cm
Object Distance ( o ) = 100 cm
Find,
Focal length =?
Focal length of pair of glasses can be calculated as -
.............<u> ( here 1 / o it's o = object distance )</u>
<u> Focal Length of the lens is 3.846 cm.</u>