Answer:
Explanation:
Let four particles are placed on X axis symmetrically about the origin and M is placed on y axis.
According to the diagram, the x component of forces balances each other and the net force acting on the particle of mass m is acting in the direction of negative Y axis.
Answer:
Acceleration is percieved, not constant velocity.
Explanation:
You are most aware when the vehicle is accelerating. At constant velocity you would not be aware of the motion. Only if the system is accelerated the dynamics must be solved considering a pseudo-force (of inertial origin) acting.
It's because of this that:
(A) False. The acceleration can be detected from the inside of a closed car.
(B) False. You would be aware of the motion, but not because humans can sense speed but acceleration.
(C) False. Constant velocity cannot be felt in a closed car.
(D) False. Again, you can't feel constant speed.
Answer:
Speed changes at the rate of 24 m/s for each second over time.
Explanation:
We are told the object's acceleration is equal to 24 m/s²
Now we know that acceleration can also be defined as the rate of change of speed with time. Also speed has a unit known as m/s.
Thus, we can rephrase the acceleration in this question to mean;
Speed changes at the rate of 24 m/s for every second with time.
Answer:
1.47x10^11
Explanation:
young modulus = stress / strain
stress = force / area = 200x9.8 / 0.00004 = 49000000
strain = extension / length = 0.001 / 3 = 0.0003333
49 million / 0.0003333 = 1.47x10^11
The centripetal acceleration of the car is related to its speed by the relationship
where ac is the centripetal acceleration, v is the car's speed and r is the radius of the circular orbit.
Looking at the formula, we can see that if we triple the speed (v'=3v), the centripetal acceleration becomes
so, the centripetal acceleration increases by a factor 9.