Friction and its Effects Quiz Questions and Answers PDF - 65

MCQ 321: Friction can reduce the efficiency of cars upto

1. 20&percent;
2. 100&percent;
3. 50&percent;
4. 40&percent;

MCQ 322: Water freezes to form ice at

1. 100 °C
2. 0 °C
3. 45 °C
4. 237 °C

MCQ 323: The thermal energy required to melt a solid with more mass is

1. more
2. zero
3. less
4. none of the above

MCQ 324: When two points move in the same direction and have the same speed and same displacement from the rest position, they are said to be in

1. phase
2. motion
3. vibration
4. oscillation

MCQ 325: As per principle of conversion of energy, energy can

1. be created
2. not be created
3. be destroyed
4. neither be created nor be destroyed