When an unbalanced force acts on an object

A causes change in motion of the object
B the speed & direction of the object will change
C causes the object to move
D All of the above

Correct Answer: All of the above

Unbalanced forces are the forces which causes change in motion of the object. It sets the object in motion and may cause the object to move. If the object is already in motion, it changes the speed and direction of the object.

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Related Questions

The secondary unbalanced force is __________ the primary unbalanced force.
A One-half
B Two-third
C n times
D $$\frac{1}{{\text{n}}}$$ times
40 N এর একটি বল 8 kg ভরের একটি স্থির বস্তুর উপর ক্রিয়া করে। 4 sec পর যদি ঘলের ক্রিয়া বন্ধ হয়ে যায় তবে প্রথম থেকে 9 sec এ বস্তুটি কত দূরত্ব অতিক্রম করবে? ( A force of 40 N acts on a fixed object of mass 8 kg. If the action of force stops after 4 sec, what distance will the object travel in 9 see from the beginning?)
A 120 m
B 150 m
C 110 m
D 130 m
E 140 m
The primary unbalanced force is maximum when the angle of inclination of the crank with the line of stroke is
A 0°
B 90°
C 180°
D 360°
In a locomotive, the maximum magnitude of the unbalanced force along the perpendicular to the line of stroke, is known as
A tractive force
B swaying couple
C hammer blow
D none of the mentioned
The primary unbalanced force due to inertia of reciprocating parts in a reciprocating engine is given by (where m = Mass of reciprocating parts, $$\omega $$ = Angular speed of crank, r = Radius of crank, $$\theta $$ = Angle of inclination of crank with the line of stroke and n = Ratio of the length of connecting rod to radius of crank)
A $${\text{m}}{\omega ^2}{\text{r}}\sin \theta $$
B $${\text{m}}{\omega ^2}{\text{r}}\cos \theta $$
C $${\text{m}}{\omega ^2}{\text{r}}\frac{{\sin 2\theta }}{{\text{n}}}$$
D $${\text{m}}{\omega ^2}{\text{r}}\frac{{\cos2\theta }}{{\text{n}}}$$
The secondary unbalanced force due to inertia of reciprocating parts in a reciprocating engine is given by (where m = Mass of reciprocating parts, $$\omega $$ = Angular speed of crank, r = Radius of crank, $$\theta $$ = Angle of inclination of crank with the line of stroke and n = Ratio of the length of connecting rod to radius of crank)
A $${\text{m}}{\omega ^2}{\text{r}}\sin \theta $$
B $${\text{m}}{\omega ^2}{\text{r}}\cos \theta $$
C $${\text{m}}{\omega ^2}{\text{r}}\frac{{\sin 2\theta }}{{\text{n}}}$$
D $${\text{m}}{\omega ^2}{\text{r}}\frac{{\cos2\theta }}{{\text{n}}}$$
The unbalanced force due to revolving masses
A Varies in magnitude but constant in direction
B Varies in direction but constant in magnitude
C Varies in magnitude and direction both
D Constant in magnitude and direction both
The primary unbalanced force is maximum _________ in one revolution of the crank.
A Twice
B Four times
C Eight times
D Sixteen times
The secondary unbalanced force is maximum __________ in one revolution of the crank.
A Two times
B Four times
C Eight times
D Sixteen times
The unbalanced force due to reciprocating masses
A Varies in magnitude but constant in direction
B Varies in direction but constant in magnitude
C Varies in magnitude and direction both
D Constant in magnitude and direction both

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