Physics chp 2 clicker question

A truck is moving at constant velocity. Inside the storage compartment, a rock is dropped from the midpoint of the ceiling and strikes the floor below. The rock hits the floor: A. Exactly below the midpoint of the ceiling B. ahead of the midpoint of the ceiling C. Behind the midpoint of the ceiling D. More info needed E. None of these

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If you carrying a heavy bag of groceries and bang your hand against the wall, the concept that most explains why you are hurt is: A. inertia B. gravity C. Acceleration D. Resistance E. None of these

A. Inertia

As an object freely falls downward, it's A. Velocity B. Acceleration increases C. Both of these D. None of these

A. Velocity increases

Three forces act on the object show. If the net force is zero. What is the magnitude of the unknown force?

B. 20 N

According to newtons law of inertia, the result of walking much of the day is similar to tightening the head of a hammer when it's handle hits a solid surface so that we are actually a little bit shorter in the A. Morning B. evening C. No difference really D.depends on your health and body type

B. Evening

What is net force? A. It is the force acting on a net B. It is the sum of all forces acting on an object C. It is always equal to zero D. It is the weight minus the normal force

B. It is the sum of all forces acting on an object

A package falls off a truck that is moving at 30 m/s. Neglecting air resistance, the horizontal speed of the package just before it hits the ground is: A. Zero B. less than 30m/s but larger than zero C. About 30 m/s D. More than 30 m/s E. more info needed

C. About 30 m/s

A baseball & a bowling ball are dropped from the same height at the same time. Which reaches the ground first? A. The baseball B. the bowling ball C. They land together D. More info needed

C. They land together

The term "uniform motion" means that an object is not: A. Speeding up B. slowing down C. Turning D. All of the above E. None of the above

D. All of the above

Who is considered to be the father of modern science? A. Plato B. Aristotle C. Copernicus D. Galileo E. Newton

D. Galileo

Which of the following is not a force? A. Tension B. Kinetic friction C. Static friction D. Gravity E. Normal force

D. Gravity

A sheet of paper can be withdrawn from under a container of milk without toppling it if the paper is jerked quickly. This best demonstrates that: A. The milk carton has no accelation B. there is an action-reaction pair of forces C. Gravity tends to hold the milk carton secure D. The milk carton has inertia E. None of these

D. The milk carton has inertia