A boy sitting in an open car moving with the constant speed throws a ball straight up into the air. The ball falls
1). behind him
2). in front of him
3). into his hand
4). by his side
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1. Electric Motor converts ________ energy to mechanical energy
2. The instrument used to measure the speed of the wind is
3. The Hooke's law is valid for
4. Which conservation principle is applicable in the case of the motion of a rocket?
6. The velocity of heat radiation in vacuum is
8. The atmospheric air is held to the Earth by :
9. Moving electric charge produces :
10. When a vibrating tuning fork is placed on a table a loud sound is heard. This is due to :