Fundamentals of Physics Study Set 2

When can you treat a moving object as if it were a point-like particle?

A particle moves along the x axis from x_i to x _f .Of the following values of the initial and final coordinates, which results in the displacement with the largest magnitude?

A particle moves along the x axis from x_i to x _f .Of the following values of the initial and final coordinates, which results in a negative displacement?

A particle moves from point x₁ to point x₂.Its displacement is given by:

A car starts from Hither, goes 50 km in a straight line to Yon, immediately turns around, and returns to Hither.The time for this round trip is 2 hours.The magnitude of the average velocity of the car for this round trip is:

The coordinate of an object is given as a function of time by x = 7t - 3t², where x is in meters and t is in seconds.Its average velocity over the interval from t = 0 to t = 2 s is:

The position y of a particle moving along the y axis depends on the time t according to the equation y = at - bt².The dimensions of the quantities a and b are respectively:

The average speed of a moving object during a given interval of time is always:

Two automobiles are 150 kilometers apart and traveling toward each other.One automobile is moving at 60 km/h and the other is moving at 40 km/h.In how many hours will they meet?

A car travels 40 kilometers at an average speed of 80 km/h and then travels 40 kilometers at an average speed of 40 km/h.The average speed of the car for this 80 km trip is:

A car starts from Hither, goes 50 km in a straight line to Yon, immediately turns around, and returns to Hither.The time for this round trip is 2 hours.The average speed of the car for this round trip is:

You leave your house and drive to your friend's house, where you stay a while.Then you come back home.Which of the following must be true of your trip?

Which of the following five coordinate versus time graphs represents the motion of an object whose speed is increasing?

This graph shows the position of a particle as a function of time.What is its average velocity between t = 5s and t = 9s?

The coordinate of a particle in meters is given by x(t)= 16t - 3.0t³, where the time t is in seconds.The particle is momentarily at rest at t =

Each of four particles moves along an x axis.Their coordinates (in meters)as functions of time (in seconds)are given by For which of these particles is the velocity increasing for t > 0?

The coordinate of an object is given as a function of time by x = 7t - 3t², where x is in meters and t is in seconds.Its velocity at t = 3s is:

Which of the following five coordinate versus time graphs represents the motion of an object moving with a constant nonzero speed?

This graph shows the position of a particle as a function of time.What is its instantaneous velocity at t = 7s?

The coordinate-time graph of an object is a straight line with a positive slope.The object has: