The results of the experiments should be similar.
Answer:
so, net force acting on the object is 121.2 Newton.
Explanation:
net force acting on it =
gravitational force acting on it - air resistance.
so, gravitational force ( g ) = mass × acceleration
( 9.8 is acceleration due to gravity )
force acting due to air resistance = 137.2 - 16
The answer is A. Proton. Protons have the opposite charge to electrons, which have negative charges.
Answer:
the tensile stress of the steel wire is 2.5 x 10³ Nm⁻².
Explanation:
Given;
applied force, F = 5000 N
cross sectional area of the steel wire, A = 0.2 m²
The tensile stress of the steel wire, is calculated as;
Therefore, the tensile stress of the steel wire is 2.5 x 10³ Nm⁻².
Answer:
F = 4000 N
Explanation:
given,
mass of rocket (M)= 5000 Kg
10 Kg gas burns at speed (m)= 4000 m/s
time = 10 s
average force = ?
at the end the rocket is at rest
by conservation of momentum
M v + m v' = 0
5000 x v - 10 x 4000 = 0
5000 v = 40000
v = 8 m/s
speed of rocket = 8 m/s
now,
we know
change in momentum = F x Δ t
F = 4000 N
Hence, the average force applied to the rocket is equal to F = 4000 N