Answer: Use this F=Ma.
Explanation: So your answer will be
F=1 Kg+9.8 ms-2
So the answer will be
F=9.8N
How'd I do this?
I just used Newton's second law of motion.
I'll also put the derivation just in case.
Applied force α (Not its alpha, proportionality symbol) change in momentum
Δp α p final- p initial
Δp α mv-mu (v=final velocity, u=initial velocity and p=v*m)
or then
F α m(v-u)/t
So, as we know v=final velocity & u= initial velocity and v-u/t =a.
So F α ma, we now remove the proportionality symbol so we'll add a proportionality constant to make the RHS & LHS equal.
So, F=kma (where k is the proportionality constant)
k is 1 so you can ignore it.
So, our equation becomes F=ma
2)accelerating to a comfortable speed.
3) Carring the boxes to the tomato display at constant speed.
4)decelerating to a stop.
5) lowering the boxes slowly to the floor.
During which of the five segments of the job does the stock person do positive work on the boxes?
A) (2) and (3)
B(1) and (2)
C) (1) only
D) (1), (2), (4) and (5)
E) (1) and (5)
Answer:
B
Explanation:
Work done can be said to be positive if the applied force has a component to be in the direction of the displacement and when the angle between the applied force and displacement is positive.
In 1 and 2 work done is positive
b. tension and gravity
c. tension, gravity, and the centripetal force
d. tension, gravity, the centripetal force, and friction
The forces directly acting on the ball hanging from a rear-view mirror while a car drives in a circle are tension, gravity, and the centripetal force.
The correct answer is c. tension, gravity, and the centripetal force.
When the car is driving in a circle, the ball experiences both tension and gravity. The tension in the string is what keeps the ball from falling, while gravity pulls the ball downward.
In addition to tension and gravity, the ball also experiences the centripetal force. This force is directed towards the center of the circular motion and keeps the ball moving in a circular path.
#SPJ12
Answer:
0.157 V
Explanation:
Parameters given:
Number of turns, N = 1207
Diameter of coil = 20 cm = 0.2 m
Radius of coil, r = 0.2/2 = 0.1 m
Magnetic field strength, B =
Time interval, t = 10 ms =
The average EMF induced in a coil due to a magnetic field is given as:
EMF =
where A = Area of coil
A = π
Therefore, EMF will be:
Answer:
Explanation:
In this case, power is the rate of transferring heat per unit time:
The heat is given by the formula of the latent heat of fusion, since the ice is melting.
Here m is the ice's mass and is the heat of fusion of ice. Recall that one day has 86400 seconds. Replacing (2) in (1) and solving:
Explanation:
The given data is as follows.
Mass, m = 62 kg, Initial speed, = 6.90 m/s
Length of rough patch, L = 4.50 m, coefficient of friction, = 0.3
Height of inclined plane, h = 2.50 m
According to energy conservation equation,
(Final kinetic energy) + (Final potential energy) = Initial kinetic energy + Initial potential energy - work done by the friction
Since, final potential energy is equal to zero. Therefore, the equation will be as follows.
Cancelling the common terms in the above equation, we get
=
= 36.055 - 13.23
= 22.825
= 6.75 m/s
Thus, we can conclude that the skier is moving at a speed of 6.75 m/s when she gets to the bottom of the hill.
Answer:
Explanation:
mass, m = 62 kg
initial velocity, u = 6.9 m/s
length, l = 4.5 m
height, h = 2.5 m
coefficient of friction, μ = 0.3
Final kinetic energy + final potential energy = initial kinetic energy + initial potential energy + wok done by friction
Let the final velocity is v.
0.5 mv² + 0 = 0.5 mu² + μmgl + mgh
0.5 v² = 0.5 x 6.9 x 6.9 + 0.3 x 9.8 x 4.5 + 9.8 x 2.5
0.5 v² = 23.805 + 13.23 + 24.5
v² = 123.07
v = 11.1 m/s