Questions from College Physics

Q: (a) Suppose the displacement of an object is related to

(a) Suppose the displacement of an object is related to time according to the expression x  Bt2 What are the dimensions of B? (b) A displacement is related to time as x = A sin (2ft), where A and f...

Q: Each of the following equations was given by a student during an

Each of the following equations was given by a student during an examination: (a) (b) Ï… = Ï… o + at2 (c) ma = Ï… 2 Do a dimensional analysis of each equation and ex...

Q: Kinetic energy KE (Topic 5) has dimensions kg · m2

Kinetic energy KE (Topic 5) has dimensions kg · m2/s2. It can be written in terms of the momentum p (Topic 6) and mass m as KE = p2/2m (a) Determine the proper units for momentum using dimensional ana...

Q: Figure 1.19 shows two vectors lying in the xy-

Figure 1.19 shows two vectors lying in the xy- plane. Determine the signs of the x- and y- components of A( , B(, and A( + B(. Figure 1.19

Q: Newton’s law of universal gravitation is represented by F = G

Newton’s law of universal gravitation is represented by F = G Mm/r2 where F is the gravitational force, M and m are masses, and r is a length. Force has the SI units kg · m/s2. What are the SI units o...

Q: Which vector has an angle with respect to the positive x-

Which vector has an angle with respect to the positive x- axis that is in the range of the inverse tangent function?

Q: The magnitudes of two vectors A( and B( are 12

The magnitudes of two vectors A( and B( are 12 units and 8 units, respectively. What are the largest and smallest possible values for the magnitude of the resultant vector R( = A( + B( ? (a) 14.4 and...

Q: Estimate the number of atoms in 1 cm3 of a solid.

Estimate the number of atoms in 1 cm3 of a solid. (Note that the diameter of an atom is about 10-10 m.)

Q: A rectangular airstrip measures 32.30 m by 210 m,

A rectangular airstrip measures 32.30 m by 210 m, with the width measured more accurately than the length. Find the area, taking into account significant figures.

Q: For an angle θ measured from the positive x- axis,

For an angle θ measured from the positive x- axis, the values of sin θ and cos θ are always (choose one): (a) greater than +1 (b) less than -1 (c) greater than -1 and less than 1 (d) greater than or...