Answer:
acceleration, a =
distance, d = 80 m
Given:
Initial velocity of object, v = 20 m/s
Final velocity of object, v' = 60 m/s
Time interval,
Solution:
(a) Acceleration is the rate at which velocity changes and constant acceleration is when the velocity changes by equal amount in equal intervals of time.
Thus
acceleration, a =
a =
(b) Now, the distance covered is given by:
Answer:
The answer is the They are equal and act in the oppisite directions
Explanation:
Just multiply 9.8 m/s ( earths gravity ) by the time 3.5 seconds.
Answer:
- 7.56 C
Explanation:
E = 105 N/C downwards
m = 81 kg
Let the charge on the man is q.
To lose te contact with the ground, the electrostatic foece should be balanced by the weight of the person.
The charge should be negative in nature so that the direction of electrostatic force is upwards and weight is downwards.
q E = m g
q = (81 x 9.8) / 105 = 7.56 C