## Posts

### What is inertia of motion?

What is inertia of motion? The characteristics that a body in motion wants to keep its motion in uniform velocity, is called inertia of motion .

### What is inertia of rest?

What is inertia of rest? The characteristics that a stationary body wants to be stationary is called inertia of rest .

### What do you mean by the law of conservation of momentum?

What do you mean by the law of conservation of momentum? If no force other than action and reaction forces act on two or more objects, no change takes place in their sum momentums in the opposite direction. For example, the momentum of two cars are the same before and after a collision. If F 1  and F 2  stand for action and reaction forces, the law of conservation of momentum states that F 1  = F 2 . m 1 u 1 +m 2 u 2 =m 1 v 1 +m 2 v 2 Here, m 1  = mass of the first object m 2  = mass of the second object u 1  = initial velocity of the first object u 2  = initial velocity of the second object v 1  = final velocity of the first object v 2  = final velocity of the second object

### What is overflowing?

What is overflowing? According to Dictionary Overflowing means flooding or flowing over a surface or area.

### What is turf toe? Symptoms, Causes and Treatments

What is turf toe? Turf toe is not a term you want to use when talking to a head football coach about their star running back or the ballerina before their diva debut.  Turf toe is the common term used to describe a sprain of the ligaments around the big toe joint. It affects athletes in order sports including soccer, basketball, wrestling, gymnastics, and dance.  An injury to the big toe due to forced hyperextension (upward bending back) of the toe. The damage is to the capsule of the joint (the first metatarsophalangeal joint) and the ligaments that connect the big toe to the foot. Hyperflexible shoes predispose to the injury. The big toe is painful, tender and swollen. Treatment is with icing, rest and anti-inflammatory medication. Taping of the big toe and a stiff insole insert in the shoe may help prevent hyperextension of the toe.  Turf toe is so named for its occurrence on the artificial playing surfaces used in American football. Turf toe also occurs in other sports played on ar

### You are standing on a weight measuring machine in a lift. If the cable of the lift tears, what is the weight that shows up on the machine?

My weight will be zero. If the cable of lift tears, I, lift, and weight meter will fall down in the same acceleration. In this case, the applied force by me at the weight meter will be zero. That's why if the cable of lift tears, then my weight will be zero, i.e the weight meter will show zero reading.

### When you try to get down from a moving train why do you fall in the forward direction?

Why need to try to get down from a moving train we get the phone in the forward direction because of the inertia of motion. The full body of us remains in dynamic condition inside the moving train. But when we try to get down from the moving train, below the parts of our body become static. Fore inertia of moving parts of the upper body is dynamic. That's why when we try to get down from a moving train, we fall in the forward direction.

## Md. Saifur Rahman

B.Sc (Honors), M.Sc (Chemistry)

Former Principal of South Point School and College, Dinajpur.