Phys 1600 final

both exert the same amount of force on each other

A 4-kg ball is released from rest near the earth's surface. At the moment it is released...

Zero newtons.

A block slides down a 20 incline with a constant speed of 20 m/s, what is the net force on it?

It cannot be determined from the information provided

A counterclockwise net torque acts on a wheel. What can you say about its angular velocity?

m/s^2

A particle moves according to the following equation that describes its position (x) as a function of time (t). A, B, C, and D are constants. The units for time is the second and the units of the x is the meter. What is the unit of the constant B?

neither the cargo nor the plane change speed.

A small glider is coasting horizontally when suddenly a very heavy piece of cargo falls out of the bottom of the plane. You can neglect air resistance. Just after the cargo has fallen out

Carrying the boxes to the tomato display at constant speed

A stock person at the local grocery store has a job consisting of the following five segments: (1) Picking up boxes of tomatoes fro m the stockroom floor vertically (2) Accelerating to a comfortable speed (3) Carrying the boxes to the tomato display at constant speed (4) Decelerating to a stop (5) Lowering the boxes slowly to the floor vertically During which of the five segment s of the job does the stock per son do zero work on the boxes?

Alice and Tom will reach the surface of the lake at the same ti me.

Alice and Tom dive from an overhang into the lake below. Tom simply drops straight down from the edge, but Alice takes a running start and jumps with an initial horizontal velocity of 25 m/s. Neither person experiences any significant air resistance. Compare the time it takes each of them to reach the lake below.

0 N

An object of mass 2 kg has a constant velocity of 2 m/s in the negative x direction. What is the net force acting on it?

Its acceleration is positive but its velocity is negative

Suppose that a car traveling to the west (the -x direction) begins to slow down as it approaches a traffic light. Which statement concerning its acceleration in the x direction is correct?

The truck will have traveled further than the car.

The motions of a car and a truck along a straight road are represented by the velocity-time graphs in the figure. The two vehicles are initially alongside each other at time t= 0. At time T, what is true about these two vehicles since time t= 0?

Block a is the most dense because it is the most submerged

Three blocks are floating in water. Which floating block is most dense?

Ball P

Two balls are thrown upward, ball P at an angle of 64 above the horizontal and ball Q at an angle of 46 above the horizontal. Both are thrown at the same initial speed. Which ball stays in the air longer? Ignore the effects of air resistance.

less than F but not zero.

Two bodies P and Q on a smooth horizontal surface are connected by a light cord. The mass of P is greater than that of Q. A horizontal force F (of magnitude F) is applied to Q as shown in the figure, accelerating the bodies to the right. The magnitude of the force exerted by the connecting cord on body P will be

Angular acceleration

When a rigid body rotates about a fixed axis, all the points in the body have the same

Non-zero and parallel to the floo

You are standing on the floor. A mouse runs on the floor towards your feet. When the mouse is one meter away from your feet, its angular momentum about your belly button is ...

The force of friction needs to be four times as large.

You need to make a sharp turn on a flat road, making a radius of curvature of 15 meters. How does the required force of static friction between your tires and the road compare if you make the turn at 30 mph vs. 60 mph?

2E3

approximately how many pennies would you have to stack to reach an average 2 meter ceiling?

car b travels farther

car A with a mass of 2m is traveling west at a speed of v. car b with a mass of m is traveling west at a speed 2v. both cars slam on breaks at the same time, skidding to stop. assuming the coefficient of friction between the wheels of the cars and the road is the same, which car tracks farther while stopping?

it velocity is perpendicular to the acceleration

for general projectile motion when the projectile is at the highest point of its trajectory