Answer:
13.93 m
Explanation:
initial velocity, u = 63 km/h
Convert km/h into m/s
so, u = 63 km/h = 17.5 m/s
reaction time, t = 0.796 s
Distance traveled by Ann before slowing down = speed of Ann x reaction time
= 17.5 x 0.796
= 13.93 m
Thus, the distance traveled by Ann before slowing down is 13.93 m.
Answer:
s = 45 m
Explanation:
The velocity given in the question is uniform. Hence, the formula for the uniform velocity shall be used here. The formula is given as follows:
where,
s = distance traveled away from the brother = ?
v = constant speed = 3 m/s
t = time taken = (0.25 min)(60 s/1 min) = 15 s
Therefore, using these values in the formula we get:
<u>s = 45 m</u>
Answer:
Electric Motor
Explanation:
There are mainly two types of machines for inter-conversion between mechanical energy and electrical energy as under:
- Motor
- Generator
Motor is a device which converts electrical energy into a mechanical whereas generator does the exact opposite of motor.
There are 2 types of motors:
AC Motor - Converts alternating current into mechanical energy
DC Motor - Converts direct current into mechanical energy
