Two forces are applied lo a 5 kg object, one is 6 N to the north and the other i

Question

Two forces are applied lo a 5 kg object, one is 6 N to the north and the other is S N to the west, The magnitude of the total force is The magnitude of the acceleration of the object is A 32 N force, parallel to the incline, is required to push a certain crate at constant velocity up a frictionless incline that is 30 degree above the horizontal, The mass of the crate Is The acceleration of the crate is ACar is travelling at 20 m/s on a horizontal road. The brakes are applied and the car skids to a stop in 4 s The coefficient of kinetic friction between the tires and road is The magnitude of the acceleration of the car is An object of mass 2 kg starts from rest and slides down an inclined plane 80 cm long in 0.5 s. The acceleration of the object down the incline is The net force acting on the object along the incline is An object weights 40 N on the earth's surface, The weight of the object on a planet that has one tenth the earth's mass and one half the earth's radius is The mass of the object at one earth's radius above earth s surface is

Explanation / Answer

1.
a)
North and west are perpendicular forces
Fnet = sqrt (F1^2 + F2^2)
= sqrt (6^2 + 8^2)
= 10 N
Answer: 10 N
b)
a = Fnet/m
= 10 N/5 Kg
= 2 m/s^2
Answer: 2 m/s^2

2.
a)
32 N ---> acts up the plane
m*g*sin thetha --> acts down the plane
for constant velocity,
m*g*sin thetha = 32
m*9.8*sin 30 = 32
m = 6.53 Kg
Answer: 6.53 Kg
b)
since it is moving with constant velocity, acceleration = 0 m/s^2
Answer: 0

3.
b)
a = (vf-vi)/t
=(0-20)/4
= -5 m/s^2
Answer: -5 m/s^2

a)
a = miu*g
5 = miu*9.8
miu = 0.52
Answer: 0.52

I am allowed to answer only 1 question at a time but I have answered 3

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