9 which observations support newtons second law of motion? choose three. it is more difficult to lift a…

9 which observations support newtons second law of motion? choose three. it is more difficult to lift a heavy object than a lighter one a rock will stay in the same place forever unless a force acts on it a rocket launches by thrusting down towards the ground the harder you push a shopping cart, the faster it will accelerate the more groceries you have in a shopping cart, the harder it is to push

9 which observations support newtons second law of motion? choose three. it is more difficult to lift a heavy object than a lighter one a rock will stay in the same place forever unless a force acts on it a rocket launches by thrusting down towards the ground the harder you push a shopping cart, the faster it will accelerate the more groceries you have in a shopping cart, the harder it is to push

Answer

Brief Explanations:

Newton's second - law is $F = ma$ (force equals mass times acceleration). Lifting a heavy object is harder as more force is needed for the same acceleration due to greater mass. Pushing a shopping cart harder makes it accelerate faster as more force leads to more acceleration. More groceries in a cart mean more mass, so more force is needed to move it. The statement about a rock staying in place is Newton's first law (inertia), and a rocket launching is Newton's third - law (action - reaction).

Answer:

  • It is more difficult to lift a heavy object than a lighter one
  • The harder you push a shopping cart, the faster it will accelerate
  • The more groceries you have in a shopping cart, the harder it is to push