A constant force is applied to a 5 kg object. As a result, the object accelerate

Question

A constant force is applied to a 5 kg object. As a result, the object accelerates at 4 m/s What is magnitude of the applied force? 2 kg of extra mass are then added to the object and the same amount of force is applied. What will be the acceleration of the object now? 4. A crate has two forces acting on it as shown below. 7 N 3 N a) What is the net force acting on the crate? b) If the crate has a mass of 8 kg, what is the acceleration of the crate? c) Describe the motion of the crate. Is there more than one possible motion?

Explanation / Answer

4.

a)

F1 = force acting on left = - 7 i

F2 = force acting on right = 3 i

Net force is given as

F = F1 + F2 = - 7 i + 3 i = - 4 i

hence net force is 4 N in left direction

b)

m = mass = 8 kg

acceleration is given as

a = F/m

a = - 4//8 = - 0.5 m/s2

c)

the crate accelerates towards left direction.

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