**1281. If the K.E. of a body becomes multiple times of the underlying worth , then new force will:**

**A. Become twice its initial value ***

B. Become three times, its initial value

C. Become four times, its initial value

D. Remains constant

**1282. Linear momentum equals the movement of two bodies with kinetic energy of 4:1. Their mass-to-weight ratio is:**

A. 1:2

B. 1:1

C. 4:1

**D. 1:4 ***

**1283. A collection of mass 5kg is moving with a force of 10kg/s. For ten seconds, a force of 0.2 N acts on it in the body’s motion direction. Its increased kinetic energy is as follows:**

A. 2.8 Joule

B. 3.2 Joule

C. 3.8 Joule

**D. 4.4 Joule ***

**1284. A power of 10 N uproots an item by 10m. On the off chance that work done is 50 J, course of power makes a point with heading of uprooting .**

A. 120 Degree

B. 90 Degree

**C. 60 Degree ***

D. None

**1285. A man weighing 50 kg ascends 20 steps of 0.25 m in height with a 20 kg load on his head. The climbing work that is done is:**

A. 5 J

B. 350 J

C. 100 J

**D. 3430 J**

**1286. if the force and particle displacement in the force direction are doubled. Work would be :**

A. Double

**B. 4 Times**

C. Half

D. 1/4 times

**1287. The kinetic energy of a particle is proportional to its momentum. What will be the speed of the molecule ?**

A. 4m/S

B. 1m/S

**C. 2m/S ***

D. None of these

**1288. A burglar took a valuable box of weight W and jumped down a height h wall before reaching the ground. He was carrying:**

A. 2 W

B. W

C. W/2

**D. Zero ***

**1289. What is the weight of 700 g of body on a planet whose mass is 1/7th of that of earth and radius is 1/2 of earth ?**

**A. 400 gf ***

B. 300 gf

C. 700 gf

D. 500 gf

**1290. Height at which value of ‘g’ becomes one fourth to that on earth is :**

**A. R ***

B. 2R

C. (3/2)R

D. 4R