Two metal balls are the same size but one weighs twice as much as the other. The

Question

Two metal balls are the same size but one weighs twice as much as the other. The dropped from the roof of a single story building at the same instant of time. The time it takes the ball to reach the ground below will be: (A) about half as long for the heavier hall as for the lighter one. (B) about half as long for the lighter bail as foe the heavier one. (D) about the same for both balls. (D) considerably less for the heavier ball, but not necessarily half as long. (E) considerably less for the lighter ball, but not necessarily half as long. The two metal balls of the previous problem roll off a horizontal table with the same speed. In this situation. (A) both balls hit the floor at approximately the same horizontal distance from the base of the table. (B) the heavier boll hits the floor at about half the horizontal distance from the base of the table than does the lighter ball. (C) the lighter ball hits the floor at about half the horizontal distance from the base of the able than docs the heavier ball. (D) the heavier boll hits the floor considerably closer to the base of the table than the lighter ball, but not necessarily at half the horizontal distance. (E) the lighter ball hits the floor considerably closer to the base of the table than the heavier ball, but not necessarily at half the horizontal distance. A stone dropped from the roof of a single story building to the surface of the earth: (A) reaches a maximum speed quite soon after release and then falls at a constant speed thereafter. (B) speeds up as it falls because the gravitational attraction gets considerably stronger as the stone gets closer to the earth. (C) speeds up because of an almost constant force of gravity acting upon it. (D) falls because of the natural tendency of all objects to rest on the surface of the earth. (E) falls because of the combined effects of the force of gravity pushing it downward and the force of the air pushing it downward. A large truck collides head-on with a small compact car. During the collision: (A) the truck exerts a greater amount of force on the car than the car exerts on the truck. (B) the car exerts a greater amount of force on the truck than the truck exerts on the car. (C) neither exerts a force on the other, the car gets smashed simply because it gets in the way of the truck. (D) the truck exerts a force on the car but the car docs not exert a force on the truck. (E) the truck exerts the same amount of force on the car as the car exerts on the truck.

Explanation / Answer

1) c

time will be about the same for both balls. It is because acceleration due to gravity will be approximately same for both cases.

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