The force exerted by a magnet is called The push or pull of magnetism can act at a distance, which means that the magnet does not have to touch an object to exert a force on it. ... In fact, magnetism is the result of a moving electric charge.Explanation:
Answer:
true
explanations: especially hot body ie.above -273 tends to emit infrared type radiation
From newtons second law of motion,
F=ma hence,
F=20N
m=5kg so,
20=5×a
a=4m/s^2
Answer:
See explanation
Explanation:
We convert the speed of the car to ms-1
90 × 1000/3600 = 25 ms-1
a) from;
F= ma
a= F/m
a= 8400/1050 = 8 ms-2
b) from
v= u - at
v= 0
u = 25 ms-1
a= 8 ms-2
t= ?
t = u/a = 25/8 = 3.1 s
From;
v^2 = u^2 - 2as
v= 0 ms-1
u^2 = 2as
s = u^2/2a
s= (25)^2/2 × 8
s= 625/16
s = 39 m
