Answer:
Final velocity of the block = 2.40 m/s east.
Explanation:
Here momentum is conserved.
Initial momentum = Final momentum
Mass of bullet = 0.0140 kg
Consider east as positive.
Initial velocity of bullet = 205 m/s
Mass of Block = 1.8 kg
Initial velocity of block = 0 m/s
Initial momentum = 0.014 x 205 + 1.8 x 0 = 2.87 kg m/s
Final velocity of bullet = -103 m/s
We need to find final velocity of the block( u )
Final momentum = 0.014 x -103+ 1.8 x u = -1.442 + 1.8 u
We have
2.87 = -1.442 + 1.8 u
u = 2.40 m/s
Final velocity of the block = 2.40 m/s east.
Answer:
Its D Kr and Xe
Explanation:
Element from the same group have simmilar properties
If you now the atomic number ،its so easy to know how much electrons they have in outermost shell.
Answer:
The force constant of the spring is 735 N/m.
Explanation:
It is given that,
Mass of fruit, m = 1500 g = 1.5 kg
Compression in the scale, x = 0.02 m
We need to find the force constant of the spring on the scale. The force acting on the scale is given by using Hooke's law. So,
Also, F = mg
k is force constant
So, the force constant of the spring is 735 N/m.
Answer: its 19 m/sec
Explanation: gotta multiply the speed by 2 so 9.8 X 2 = 19
Answer:
139.4 N
Explanation:
from the question we are given the following
distance (s) = 1 m
time (t) = 1.7 s
power (p) = 82 W
force (f) = ?
we can get the force by applying the formula below
power = work done / time
where work done = force x distance
therefore power = (force x distance ) / time
82 = (f x 1) / 1.7
f = (82 x 1.7) / 1 = 139.4 N