Questions from College Physics

Q: A woman at an airport is towing her 20.0-

A woman at an airport is towing her 20.0-kg suitcase at constant speed by pulling on a strap at an angle u above the horizontal (Fig. 4.76). She pulls on the strap with a 35.0-N force, and the frictio...

Q: Which of the following objects can’t be accelerating? (a

Which of the following objects can’t be accelerating? (a) An object moving with a constant speed (b) An object moving with a constant velocity or (c) An object moving along a curve.

Q: Consider the following controls in an automobile: gas pedal, brake

Consider the following controls in an automobile: gas pedal, brake, steering wheel. The controls in this list that can cause an acceleration of the car are (a) All three controls (b) The gas pedal and...

Q: A girl on a bicycle takes 15.0 s to ride

A girl on a bicycle takes 15.0 s to ride halfway around a circular track of radius 10.0 m (Figure 3.4). (a) What is the girl’s average speed? (b) What is the magnitude of her average...

Q: A certain car is capable of accelerating at a rate of 0

A certain car is capable of accelerating at a rate of 0.60 m/s2. How long does it take for this car to go from a speed of 55 mi/h to a speed of 60 mi/h?

Q: Suppose you are carrying a ball and running at constant velocity on

Suppose you are carrying a ball and running at constant velocity on level ground. You wish to throw the ball and catch it as it comes back down. Neglecting air resistance, should you (a) Throw the bal...

Q: As a projectile moves in its parabolic path, where are the

As a projectile moves in its parabolic path, where are the velocity and acceleration vectors perpendicular to each other? (a) Everywhere along the projectile’s path (b) At the peak of its path (c) Now...

Q: A crate is sitting in the center of a flatbed truck.

A crate is sitting in the center of a flatbed truck. As the truck accelerates to the east, the crate moves with it, and doesn’t slide on the bed of the truck. In what direction is the friction force e...

Q: Suppose your friend is sitting on a sled and asks you to

Suppose your friend is sitting on a sled and asks you to move her across a flat, horizontal field. You have a choice of (a) Pushing her from behind by applying a force downward on her shoulders at 30&...

Q: Consider the two situations shown in Figure 4.30, in

Consider the two situations shown in Figure 4.30, in which there is no acceleration. In both cases the men pull with a force of magnitude F. Is the reading on the scale in part (i) of the figure (a) G...