Yes because we often used it and takes long time to spent and forgot to eat on time.
The design of rutherfords experiment show what he was trying to find out is by detect charged particles. He shot positively charged alpha particles at foil containing gold atoms, what they did showed what was in them neutrons etc Thank you for posting your question here at brainly. I hope the answer will help you. Feel free to ask more questions.
Answer:
a)8.59 m/s
b)-0.8818 m/s²
Explanation:
a) Given the van moved 40 m in 7.70 seconds to a final velocity of 1.80 m/s
Apply the equation for motion;
where
t=time the object moved
d=displacement of the object
Vi=initial velocity
Vf=final velocity
Given
t=7.70s
Vf=1.80 m/s
d=40m
Vi=?
Substitute values in equation
b)Acceleration is the rate of change in velocity
Apply the formula
Vf=Vi+at
where;
Vf=final velocity of object
Vi=Initial velocity of the object
a=acceleration
t=time the object moved
Substitute values in equation
Given;
Vf=1.80 m/s
Vi=8.59 m/s
t=7.70 s
a=?
Vf=Vi+at
1.80=8.59+7.70a
1.80-8.59=7.70a
-6.79=7.70a
-6.79/7.70=7.70a/7.70
-0.8818=a
The van was slowing down.
Answer:
The amount of effort needed to move the box is 187.5 N
Explanation:
weight of the box = load moved by the ramp, L = 750 N
mechanical advantage of the ramp, MA = 4
effort needed to move the box, E = ?
Mechanical advantage is given as = Load / Effort
Effort = Load / Mechanical advantage
Effort = 750 / 4
Effort = 187.5 N
Therefore, the amount of effort needed to move the box on to the truck using a ramp is 187.5 N