### 1. A light body and heavy body have equal momentum, which one have greater kinetic energy?

### 2. What does speedometer of a car indicates?

### 3. Write down the dimensions of viscosity coefficient

### 4. Why do we use ball-bearings?

### 5. How errors are combined in following mathematical operations of physical quantities?

(i) Subtraction (ii) Product

### 6. Draw the Velocity – Time graph for following cases when (i) Object is moving in positive direction with acceleration (ii) An object is under free fall.

### 7. Derive the necessary relation for safest velocity of an automobile on a banked road of radius r and friction coefficient μ.

### 8. If variation of position with time t is given by **x = a + ****bt**** + ct****2 **. Write the dimensions of a, b & c.

### 9. The forces whose magnitude is in the ratio of 3:5 give a resultant of 35

N. If the angle b/w them is 60°. Find the magnitude of each force.

### 10. What is an impulse? A ball coming towards a batsman with a certain

velocity U. He deflects the ball by an angle Q and its velocity increases to V. Draws A vector diagram to show initial momentum, find momentum and impulse.

### 11. In the given system of masses m1= 5 kg, and coefficient of friction for each constant is 0.2. Calculate the mass m2, if m1 is sliding down with an acceleration of 2 ms–2. What will be the tension in the string?

### 12. The radius and length of a solid cylinder is measured as R = (10.0 ± 02) cm, I = (20.0 ± 0.5) cm. Calculate the volume and surface area of the cylinder and error in them.

### 13. A bomb is exploded into three fragments of mass 1:2:3. The fragment having lighter masses move with a speed of 40 m/s in mutually perpendicular to each other. Calculate the velocity of the third fragment.