PHYS 1010 Test 1

Consider drops of water that leak from a dripping faucet. As the drops fall they: A) get closer together B) get farther apart C) remain at a relatively fixed distance from one another

B) get farther apart

If an object's mass is decreasing while a constant force is applied to the object, the acceleration: A) decreases. B) increases. C) remains the same.

B) increases.

Whenever the net force on an object is zero, its acceleration: A) may be zero B) is zero

B) is zero

Which of the following is not a vector quantity? A) velocity. B) speed. C) acceleration. D) None are vectors. E) all are vectors.

B) speed.

Your weight is: A) actually your mass. B) the gravitational attraction between you and the Earth. C) a property of mechanical equilibrium. D) all of these. E) none of these.

B) the gravitational attraction between you and the Earth.

In science, facts: A) are absolute. B) may change. C) mean very little. D) are more important that theories.

B) May Change

Early Greeks knew A) the size of the moon. B) the size of the Earth. C) the Earth-moon distance. D) all of the above. E) none of the above.

D) all of the above.

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 information is needed. E) none of these.

A) exactly below the midpoint of the ceiling.

In science, an educated guess is a: A) hypothesis. B) theory. C) both of these.

A) hypothesis.

A force is a vector quantity because it has both: A) magnitude and direction. B) mass and acceleration. C) action and reaction counterparts.

A) magnitude and direction.

In which case would you have the larges mass of gold? If your chunk of gold weight 1 N on the: A) moon. B) Earth. C) planet Jupiter.

A) moon.

The scientific method is most effective in: A) making hypotheses. B) gaining, organizing, and applying new knowledge. C) discovering new things. D) making theories. E) performing experiments.

B) gaining, organizing, and applying new knowledge.

A light woman and a heavy man jump from an airplane at the same time an open their same-size parachutes at the same time. Which person will get to a state of zero acceleration first? A) the light woman. B) the heavy man. C) both at the same time. D) not enough information.

A) the light woman.

As an object freely falls downward, its: A) velocity increases. B) acceleration increases. C) both of these. D) none of these.

A) velocity increases.

An apple falls from a tree and hits the ground 5 meters below. It hits the ground with a speed of about: A) 5 m/s. B) 10 m/s. C) 15 m/s. D) 20 m/s. E) not enough information.

B) 10 m/s.

If a projectile is fired straight up at a speed of 10 m/s, the total time to return to its starting position is about: A) 1 second B) 2 seconds C) 10 seconds D) 20 seconds E) not enough information

B) 2 seconds

A piece of rope is pulled by two people in a tug-of-war. Each pulls with 400 N of force. What is the tension in the rope? A) zero B) 400 N C) 600 N D) 800 N E) non of these.

B) 400 N

Suppose you're coasting on level ground in a car at 60 km/h and apply the brakes until you slow to 40 km/h. When you suddenly release the brake, the car tends to A) momentarily regain its higher initial speed B) continue moving at 40 km/h in the absence of forces C) decrease in speed whether or not other forces act

B) continue moving at 40 km/h in the absence of forces

An object is propelled along a straight-line path by a force. If the net force were doubled, the object's acceleration would: A) quadruple B) double C) Stay the same D) halve E) none of these

B) double

When a rock thrown straight upwards gets to the exact top of its path, its A) velocity is zero and its acceleration is zero B) velocity is zero and its acceleration is about 10 meters per second. C) velocity is about 10 m/s and its acceleration is zero. D) velocity is about 10 m/s and its acceleration is about 10 meters per second per second. E) none of these.

B) velocity is zero and its acceleration is about 10 meters per second.

When a falling object has reached its terminal velocity, its acceleration is: A) constant. B) zero. C) g.

B) zero.

The vertical height attained by a basket ball player who achieves a hang time of a full 1 second is about: A) 0.8 m B) 1 m C) 1.2 m D) 2.5 m E) even more than 2.5 m

C) 1.2 m

The gain in speed each second for a freely-falling object is about: A) 0 B) 5 m/s C) 10 m/s D) 20 m/s E) depends on the initial speed.

C) 10 m/s

Ten seconds after starting from rest, an object falling freely downward will have a speed of about: A) 10 m/s. B) 50 m/s. C) 100 m/s. D) more than 100 m/s

C) 100 m/s.

An empty roller-coaster car at an amusement park takes 3 minutes to make its ride from start to finish. Neglecting friction, a fully loaded care would take: A) less than 3 minutes. B) more than 3 minutes. C) 3 minutes.

C) 3 minutes.

Strange as it may seem, it is just as hard to accelerate a car on the moon as it is to accelerate the same car on Earth. This is because: A) the weight of the car is independent of gravity. B) the mass of the car is independent of gravity. C) Nonsense! A car is much more easily accelerated on the moon than on the Earth.

C) Nonsense! A car is much more easily accelerated on the moon than on the Earth.

When you stand at rest on a pair of bathroom scales, the readings on the scales will always: A) each be half your weight. B) each equal your weight. C) add to equal your weight.

C) add to equal your weight.

The Earth pulls on the moon. Similarly the moon pulls on the Earth, evidence that the: A) Earth and the moon are simply pulling on each other. B) Earth's and moon's pulls compromise an action-reaction pair. C) both of these. D) neither of these.

C) both of these.

Arnold Strongman and Suzie Small each pull very hard on opposite ends of a massless rope in a tug-of-war. The greater force on the rope is exerted by: A) Arnold, of course. B) Suzie, surprisingly. C) both the same, interestingly enough.

C) both the same, interestingly enough.

A player hits a ball with a bat. The action force is the impact of the bat against the ball. The reaction to this force is the: A) air resistance on the ball. B) weight of the ball. C) force of the ball against the bat. D) grip of the player's hand against the ball. E) none of these.

C) force of the ball against the bat.

The synthesis of a large collection of information that contains well-tested and verified hypotheses about certain aspects of the world is known as scientific: A) fact. B) hypothesis. C) law or principle. D) theory. E) none of these.

C) law or principle.

As a ball falls, the action force is the pull of the Earth's mass on the ball. The reaction force is the: A) air resistance acting against the ball. B) acceleration of the ball. C) pull of the ball's mass on the Earth. D) non-existent in this case. E) non of these.

C) pull of the ball's mass on the Earth.

A ball is thrown upwards an caught when it comes back down. Neglecting air resistance, its speed when caught is: A) more than the speed it had when thrown upwards. B) less than the speed it had when thrown upwards. C) the same as the speed it had when thrown upwards.

C) the same as the speed it had when thrown upwards.

A Mack truck an a Volkswagen traveling at the same speed collide head-on. The impact force is: A) greater on the Volkswagen. B) greater on the Mack truck. C) the same for both.

C) the same for both.

Compared to the mass of certain object on Earth, the mass of the same object on the moon is: A) less. B) more. C) the same.

C) the same.

A truly educated person is knowledgeable about: A) science. B) the arts. C) religion. D) all of these.

D) all of these.

Compared to a 1 kg-block of solid iron, a 2-klg block of solid iron has twice as much: A) inertia. B) mass. C) volume. D) all of these. E) none of these.

D) all of these.

A ball tossed vertically upward rises, reaches its highest point, and then falls back to its starting point. During this time the acceleration of the ball is always: A) in the direction of motion. B) opposite its velocity. C) directly upward. D) directly downward.

D) directly downward.

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 acceleration. 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.