Answer: 10.96secs
Explanation:
According to newton's second law
Force = mass × acceleration
F = ma
F = m(v-u)/t
Cross multiplying we have
Ft = m(v-u)
t = m(v-u)/F
Given F = 2600N m = 19,000kg v = 1.5m/s u = 0m/s
Substituting this values in the formula for the time we have
t = 19000(1.5-0)/2600
t = 28,500/2600
t= 10.96secs
Answer:
Explanation:
Given that :
The radius of the circular loop = 4.0 m
Maximum Emf 
= 5.0 V
The maximum rate at which the magnetic field strength is changing if the magnetic field is oriented perpendicular to the plane in which the loop lies can be determined via the expression;
= 
= 
5.0 = 
5.0 = 
Answer:
The one with highest velocity
Explanation:
The momentum of an object is given by
where
m is the mass of the car
v is the velocity of the car
In this problem, we have two identical cars: identical means they have same mass, so
The momentum of car 1 is
while the momentum of car 2 is
By comparing the two expressions, we see that the car with greatest momentum is the one with highest velocity, since the mass is the same.
Answer:
<em>A. The magnitude of the net force exerted on the disk
</em>
<em>B. The distance between the center of the disk and where the net force is applied to the disk</em>
<em></em>
Explanation:
To determine the change in angular momentum of the disk after a stipulated time, one must measure the above options.
<em>The radius of the disk is fixed and does not vary with the experiment, and the mass of the disk is also constant and known.</em>
<em>One must first measure the magnitude of the net force exerted on the disk</em>, and determine the torque as a result of this torque from the distance between the center of the disk and the point where the net force is applied. The above statement also points out <em>the necessity of measuring the distance between the center of the disk and the point where the net force is applied on the disk, as both the torque, and the moment of inertia is calculated from this point</em>.
torque T = Force time distance of point of action of force from mid point of the disk
T = F X r
T x t = Δ(Iω)
Where t is the time,
and Δ(Iω) is change in angular momentum.
