The figure below shows a clawhammer as it is being used to pull a nail out of a horizontal board. A force of magnitude 152 N is exerted horizontally as shown. (Assume that the force the hammer exerts on the nail is parallel to the nail and perpendicular to the position vector from the point of contact. The x-component of this force's lever arm is 5 cm.) 30.0 cm Single point of contact 30.09 5.00 cm (a) Find the force exerted by the hammer claws on the nail. (Enter the magnitude.) (b) Find the force exerted by the surface at the point of contact with the hammer head. (Assume the positive x-axis is to the right.) magnitude N direction ° counterclockwise from the +x-axis

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Newton's First Law of Motion

If a very smooth ball is rolled down an inclined surface with zero friction, the ball will continue to roll indefinitely for an infinite time, in an attempt to reach to the same height on the opposite hill!