What magnet maintains its magnetic proaperties even in the absence of an external magnetic field? a) Ferromagnet b Paramagnet c)
1 answer:
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Answer:
Explanation:
The impulse theorem states that the product between the force and the time interval of the collision is equal to the change in momentum:
where
F is the force
is the time interval
m is the mass
is the change in velocity
Here we have
m = 84 kg
So we can solve the equation to find the force:
Answer:
Explanation:
Given
Total run=198 m
maximum speed=317 m/min=5.28 m/s
acceleration
(a)Distance traveled while accelerating
s=12.57 m
time taken
v=u+at
t=4.75 s
(b)Time taken to cover 198 m
if car takes 12.57 m & 4.75 s to reach max speed so it also takes 12.57 m and 4.75 s to stop from max speed
Distance traveled with max speed=198-25.14=172.86 m
time taken
total time=4.75+32.73+4.75=42.25 s