“Momentum and changes in momentum are not always in same direction”. Explain by suitable example.
“Momentum and changes in momentum are not always in same direction”. Explain by suitable example.
When end of string is tied to stone and it is whirled in horizontal plane, magnitude of momentum remain same but direction of momentum is continuously changing.
To change direction of momentum force is required which is supplied by hand. To whirl stone with more speed or to rotate in circle of smaller radius more force is required. To change momentum by larger magnitude, larger force is to be applied. Due to this property Newton's second law is obtained.
Similar Questions
A machine gun fires a bullet of mass $65\,g$ with a velocity of $1300 \,m / s$. The man holding it can exert a maximum force of $169 \,N$ on the gun. The number of bullets he can fire per second will be ............
A machine gun fires a bullet of mass $65\,g$ with a velocity of $1300 \,m / s$. The man holding it can exert a maximum force of $169 \,N$ on the gun. The number of bullets he can fire per second will be ............
A gun applies a force $F$ on a bullet which is given by $F =\left(100-0.5 \times 10^{5} t \right) N$. The bullet emerges out with speed $400 \,m / s$. Then find out the impulse exerted till force on bullet becomes zero. (in $N - s$)
A gun applies a force $F$ on a bullet which is given by $F =\left(100-0.5 \times 10^{5} t \right) N$. The bullet emerges out with speed $400 \,m / s$. Then find out the impulse exerted till force on bullet becomes zero. (in $N - s$)
- [AIIMS 2019]
The momentum $p$ of an object varies with time $(t)$ as shown in figure. The corresponding force $(F)$-time $(t)$ graph is
The momentum $p$ of an object varies with time $(t)$ as shown in figure. The corresponding force $(F)$-time $(t)$ graph is
Figures $(a), (b), (c)$ and $(d)$ show variation of force with time.
The impulse is highest in figure.
Figures $(a), (b), (c)$ and $(d)$ show variation of force with time.
The impulse is highest in figure.
- [JEE MAIN 2023]
Consider the following statement: When jumping from some height, you should bend your knees as you come to rest, instead of keeping your legs stiff. Which of the following relations can be useful in explaining the statement
Consider the following statement: When jumping from some height, you should bend your knees as you come to rest, instead of keeping your legs stiff. Which of the following relations can be useful in explaining the statement