A 3.5 kg wooden block is pulled with 12.5 N of force across a rough surface. If the force of friction is 4.8 N, find the net for
1 answer:
Answer:
F = 7.7 [N]
a = 2.2 [m/s²]
Explanation:
In the attached picture we see the forces on the wooden block, the total force is obtained by means of the sum of the pushforce and the friction force.
Now we must apply Newton's second law, which tells us that the total force on the body must be equal to the product of mass by acceleration.
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Answer 1) : 62.5 km/hour is the average velocity of the train.
2) The final velocity of the car at the end of 75 m is 14.69 m/s
Explanation:
1) Displacement of the train = 100 km + 150 km = 250 km
Total time train took =1 hour 15 min+ 45 min + 2 hours = 240 min = 4 hours
Average velocity=
62.5 km/hour is the average velocity of the train.
2) The acceleration of the car, a= 1.2
Distance covered by the car,s = 75 m
Initial velocity of the car , = 6 m/s
Final velocity of thre car ,=?
Using third equation of motion:
The final velocity of the car at the end of 75 m is 14.69 m/s
Answer:
The number of turns in secondary coil is 4000
Explanation:
Given:
Current in primary coil A
Current in secondary coil A
Number of turns in primary coil
In case of transformer the relation between current and number of turns is given by,
For finding number of turns in secondary coil,
Therefore, the number of turns in secondary coil is 4000