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Posted by on Monday, October 4, 2010 at 1:37pm.

true or false
If a net force acts on an object, the object's speed will change.

An object's velocity will change if a net force acts on the object.

If two object have the same acceleration, they are under the influence of equal forces.

The net force which acts on an object which remains at rest is zero.

A truck initially moving at a constant velocity will slow down unless a small net force is applied

During the collision of a car with a large truck, the car exerts a lesser force on the truck than the truck exerts on the car.

  • physics - , Monday, October 4, 2010 at 1:47pm

    true or false
    If a net force acts on an object, the object's speed will change.

    Usually, but not for example if going in a circle.


    An object's velocity will change if a net force acts on the object.

    Yes, magnitude or direction or both

    If two object have the same acceleration, they are under the influence of equal forces.

    What if they have different masses?

    The net force which acts on an object which remains at rest is zero.

    Guess so or it would accelerate.

    A truck initially moving at a constant velocity will slow down unless a small net force is applied

    In practice yes due to air drag and other frictional forces

    During the collision of a car with a large truck, the car exerts a lesser force on the truck than the truck exerts on the car.

    The force on one is equal in magnitude and opposite in direction to the force on the other. The resulting accelerations are quite different.

  • physics - , Monday, October 4, 2010 at 1:48pm

    thanks, i got them all except for the first one.

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