24 December, 07:33
You give a shopping cart a shove down the aisle. The cart is full of groceries and has a mass of 18 kg. The cart accelerates at a rate of 3 m/s2. How much force did you exert on the cart?
24 December, 09:08
Force = (mass x acceleration) = 18 x 3, = 54N.
24 December, 09:27
Newton's 2nd law: Force = (mass) x (acceleration).
While the cart is accelerating at 3 m/s², you must be pushing it
with (18 kg) x (3 m/s²) = 54 newtons of force.
As soon as you stop pushing, it stops accelerating.
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» You give a shopping cart a shove down the aisle. The cart is full of groceries and has a mass of 18 kg. The cart accelerates at a rate of 3 m/s2. How much force did you exert on the cart?