False. An object will go on forever if there were no forces to act upon it.
In space, a rocket will go forever at the speed it projects. We only need the engines to steer an for lift off.
On Earth, a toy car will go a short distance when pushed. Friction will go against it.
The object will speed up change direction or slow down.
False
Yes, of course if there is force there is acceleration.
true
true
False
False. It can increase its velocity.
4.1 mechanical and chemical forces break down rocksPart oneReview:If the sentence is true, write true. If it is false write false, replace the underlined word or words to make it true1. Rocks are made of minerals: true2. Different minerals have the same properties: different3. Rocks can be broken down into glass: sediment
Yes, forces do all of these things. A force changes the velocity of an object, and is the only thing that can change the velocity of an object.
though different terminology is used. Motion is thought of in acceleration and velocity. Now, velocity is just the distance covered over an amount of time, or speed. Acceleration is the change in speed. In general terms, any object that is standing still is being acted upon by equal and opposite forces, and if one of those forces was changed, then the object would undergo acceleration. Think of a person holding a coffee cup. Gravity is working on the object to pull it down, and his or her arm is pulling equally in the opposite direction to keep it up. If the person were to let go, there wouldn't be the upward force, and the cup would accelerate towards the Earth, and its "motion" would be changed. TRUE!
False. At least the way "acceleration" is described in physics, acceleration involves any change in velocity - so the "accelerating" object can speed up, slow down, or simply change direction.
true
The same as they do to any other object.
False
True
The word "That" is strong in the sentence "It's true that he was late, but his car would have broken down." * True False
true