Considering that the book is moving with constant speed, the force applied by Anna must be the same that the friction force:
If we clear the previous equation:
An alpha particle is identical to a helium nucleus ... 2 protons, 2 neutrons. <em>(1)</em>
Answer:
-4/7
Explanation:
Given the following
A=4i-10j and B= 7i+5j
A+ bB = 4i-10j + (7i+5j)b
A+ bB = 4i-10j + 7ib+5jb
A+ bB =
The vector along the x-axis is expressed as i + 0j
If the vector A+ bB is pointing in the direction of the x-axis then;
Hence the value of b is -4/7
Answer:
1008.2m
Explanation:
H = 1/2gt^2
g is acceleration due to gravity 10m/s^2
= 1/2 x 10 (14.2)^2
= 1/2 x 10 x 201.64
= 1008.2m
Explanation:
work done = force × distance
= 200N × 100m
= 20000J
= 20KJ