A 1.5-kg object has a velocity of 5
M/s at t = 0.It is accelerated at a constant rate for five seconds after which it has a velocity of (6
+ 12
)m/s.What is the magnitude of the resultant force acting on the object during this time interval?
A)3.8 N
B)3.2 N
C)2.8 N
D)4.3 N
E)4.6 N

Question

A 1.5-kg object has a velocity of 5 
M/s at t = 0.It is accelerated at a constant rate for five seconds after which it has a velocity of (6 
+ 12 
)m/s.What is the magnitude of the resultant force acting on the object during this time interval?
A)3.8 N 
B)3.2 N 
C)2.8 N 
D)4.3 N 
E)4.6 N

Quizplus · Accepted Answer

We first find the acceleration of the object using the given information:
v = u + at
12 = 5 + a(5)
a = 1.4 m/s^2

The resultant force on the object can be found using:
F = ma
F = 1.5 kg × 1.4 m/s^2
F = 2.1 N

Therefore, the magnitude of the resultant force acting on the object during this time interval is 2.1 N, which is closest to option C) 2.8 N.

A 15-Kg Object Has a Velocity of 5