Answer:
v₂ = 2.568 m/s
Explanation:
given,
mass of Corey = 95 Kg
reading of sale for first 3 s when elevator start to move = 850 N
scale reading for the next 3.0 s = 930 N
Gravitation force acting =
F = m g
F = 95 x 9.8
F = 931 N
using newtons second law, due to movement of elevator
F_{net} = m a
W - N = m a₁
931- 850 = 95 x a₁
a₁ = 0.852 m/s²
now,
velocity calculation
v₁ = a₁t
v₁ = 0.852 x 3 = 2.557 m/s
now, For second case
931 - 930 = 95 x a₂
a₂ = 0.011 m/s²
now, velocity after 4 s
v₂ = v₁ + a₂ t
v₂ = 2.557+ 0.011 x (4 - 3)
(4-3) because velocity after 3 second is calculate we need to calculate velocity after 4 s from beginning.
v₂ = 2.557 + 0.011
v₂ = 2.568 m/s
velocity of the elevator is equal to v₂ = 2.568 m/s
not sure which average this is but one of the averges is 12.5 m/s^2... it's been a while since physics so I'm a little rusty
btw, to find this average you have to divide 60 by 4 to get 15m/s^2.
next you divide 60 by 6 to get 10m/s^2.
then you add 15 and 10 to get 25.
finally, you divide 25 to get 12.5m/ s^2.
The force of the ball on the club is 200 N backward.
Option 2 is the correct answer.
<h3>
Newton's Third Law </h3>
Newton's third law states that when two bodies interact, they apply forces to one another that are equal in magnitude and opposite in direction.
Given that the force of a golf club on a golf ball is 200 N forward direction.
In this situation, newton's third law of motion is applicable on the ball.
According to newton's third law, the magnitude of the force will be the same. Hence,
Force = 200 N
The direction of the force will be opposite. If the force on a golf ball is applied in forward direction, then the force on the golf club will be applied in the backward direction.
Hence we can conclude that the force of the golf ball on the golf club will be 200 N in the backward direction.
To know more about newton's third law, follow the link given below.
brainly.com/question/974124.
Answer:
When the piston is pulled up, air gets sucked into the pump through the inlet. The pump chamber depressurizes as it fills with air. When the piston is forced down, the air becomes compressed and closes the inlet. Then the air flows out from the outlet