a) To find the initial acceleration, we can use Newton's second law of motion, which states that Force = mass x acceleration, or F = m*a. We can rearrange the equation to find the acceleration: a = F/m.
Given the force (F) is 15N, and the mass (m) of the curling stone is 20kg, we can calculate the acceleration:
a = F / m
a = 15N / 20kg
a = 0.75 m/s²
So the initial acceleration of the curling stone is 0.75 m/s².
b) Once the stone is moving at a uniform velocity, it means that there is no acceleration, so the net force acting on it is zero. Therefore, to keep the stone moving at a uniform velocity, the force required must be equal to the frictional force acting on the stone in the opposite direction. In the case of curling, the frictional force is usually very small because the ice surface is very slippery. So, very little force will be required to maintain its uniform velocity.
dynamics
A curling stone has a mass of 20kg. a curler pushed the stone across the ice to launch it down the rink.
a)if the curler starts to move the stone by pushing it with 15N, what is the stones initial acceleration?
b)once moving, how much force is required to keep the stone moving at a uniform velocity?
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