# Physics Questions

### 40 terms by GlennRobinson

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v^2=ax

no

yes

### On a position versus time graph, the slope of a line between two points on the graph is?

the average velocity

### On a velocity versus time graph, the slope of a tangent line to the graph is ?

the instantaneous acceleration

no

yes

### A car is driven from town A to town B. When it arrives at B the magnitude of its displacement from A is

Always less than or equal to the distance it traveled.

### At any moment the slope of the velocity vs time graph of a body moving in a straight line is its

None of the above

Displacement

### You throw a ball straight up into the air. After it leaves your hand, at what point in its flight does it have the maximum value of acceleration?

Its acceleration is constant everywhere

### You drop a rock off a bridge. When the rock has fallen 4 m, you drop a second rock. As the two rocks continue to fall, what happens to their velocities?

Both increase at the same rate

Velocity

No, never.

### A vector A is added to a vector B. Under what conditions does the resultant vector A+ B have greatest magnitude?

When A and B are parallel and in the same direction.

### A rock is dropped out of the window of a moving car. At the same time a ball is dropped from rest from the same height. Which will reach the ground first? (Neglect air resistance.)

Both will reach at the same time

### A projectile is launched from the ground at an angle of 30 0 . At what point in its trajectory does this projectile have the least speed?

At the highest pointin its flight

### A car is travelling in a circle with a constant speed. Which statement is true?

The car has changing velocity and changing acceleration.

### A net force F acts on an object. This means

the object may be moving in any direction.

### A net force F acts on an object. This means A net force F acts on an object. This means

the object must be acceleration in the direction of

Smaller

### A small sports car collides head - on with a massive cement truck. Which vehicle experiences the greater force due to the collision

Both experience the same magnitude of force during the collision.

the car

### An object of mass M on a horizontal surface is pushed with a horizonta force F. The coefficient of static friction is μ s . The object does not move. The magnitude of the static friction force on the object is

An object of mass M on a horizontal surface is pushed with a horizonta force F. The coefficient of
static friction is
μ
s
. The object does not move. The magnitude of the static friction force on the
object is

### When you climb up a rope, the first thing you do is pull down on the rope. How do you manage to go up the rope by doing that

the rope actually pulls you up

100 N

### You and a friend can each pull with a force of 20N. If you want to rip a rope in half, what is the bext way

tie the rope to a tree, and you both pull from the same end

### A piece of mud flies off the rim of a bycicle wheel. In what direction will it be going immediately after leaving the wheel? (Ignore gravity in this short time inter

On a line at a tangent to the edge of the wheel.

no

### A box is being pulled across a rough floor at a constant speed. What can you say about the work done by friction

Friction does negative work

### A ball tied to a string is being whirled around in a circle. What can you say about the work done by ten

Tension does no work at all

three forces

### What force is responsible for holding a car in an unbanked curve

The force of friction

### What force is responsible for holding a car in a banked curve with frictio

A combination of the force of friction and the horizontal component of the normal force.

### Which statement about work is true?

Only the component of a force parallel to the displacement does work.

### A box weighing 100 N is lifted 1.5 m vertically, and is then held there. How much work is being done in holding the box in the elevated position

No work is being done

150 J

### A women pulls a crate up a rough incline plane at a constant velocity. Which statement is false

The work done by gravity is zero

more than 10 J

### You slam on your brakes in a panic and skid a certain distance down a straight and level road. If you had been travelling twice as fast, what distance would the car have skidded under the same conditions?

four times further

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