University Physics I Q&A
The displacement of an object during any time interval is always _______ the
distance it travels during that same interval. - (CORRECT ANSWER)less than or
equal to
You shoot an arrow in a high arc toward a target located at some distance away. At
the highest point in its flight, the arrow's velocity is _____ and acceleration is ______
- (CORRECT ANSWER)are both nonzero
A projectile ie fired at at an angle of 45 degrees above the horizontal. If air resistance
is neglected, the line in the graph that best represents the horizontal displacement of
the projectile as a function of travel time is _______. - (CORRECT ANSWER)4
The information on a compact disk is scanned by a laser initially at a radius of 2.4 cm
and then out to a maximum of 6.0 cm. Because the dimensions of the pit information
remains constant with radius, the disk motor adjusts so that the tangential velocity
remains at a constant. What is the ratio of the inner to outer rotational velocities? -
(CORRECT ANSWER)2.5
A turntable has an angular velocity of 1.4 rad/s. The coefficient of static friction
between the turntable and a block placed on it is 0.20. The maximum distance from
the center of the turntable that the block can be placed without sliding is
approximately ______. - (CORRECT ANSWER)0.5 m
The density of seawater was measured to be 1.07 g/cm^3. The density in SI units is
____. - (CORRECT ANSWER)1.07x10^3 kg/m^3
A body of weight w is in free fall near the surface of the Earth. What force does the
body exert on the Earth? - (CORRECT ANSWER)w
The tension of the right-hand string (T2) divided by the tension of the left-hand string
(T1) is given by _____. - (CORRECT ANSWER)cos(theta1)/cos(theta2)
A car is traveling south at 30km/h. It rounds a curve, and 6s later it is traveling west
at 30km/h. The magnitude of the average acceleration of the car is _____. -
(CORRECT ANSWER)7.1 km/hr*s
A constant force of 45N directed at angle theta to the horizontal pulls a crate of
weight 100N from one end of a room to another a distance of 4m. Given that the
vertical component of the pulling force is 12N, calculate the work done by the force in
the moving crate. - (CORRECT ANSWER)1.7x10^2 J
A proud new Jaguar owner drives her car at a speed of 25m/s into a corner. The
coefficients of friction between the road and the tires are 0.70 (static) and 0.40
(kinetic). What is the minimum radius of curvature for the corner in order for the car
not to skid? - (CORRECT ANSWER)91 m
A particle has a momentum as a function of time given by vector P=7t(i hat)+9t^3(j
hat)+3sin(wt)(k hat) where w is a constant. The force acting on the particle is _____.
- (CORRECT ANSWER)7(i hat)+27t^2(j hat)+3wcos(wt)(k hat)
A physical quantity that is sometimes described as the measure of the resistance of
a body to a change in motion is ______. - (CORRECT ANSWER)mass
The displacement of an object during any time interval is always _______ the
distance it travels during that same interval. - (CORRECT ANSWER)less than or
equal to
You shoot an arrow in a high arc toward a target located at some distance away. At
the highest point in its flight, the arrow's velocity is _____ and acceleration is ______
- (CORRECT ANSWER)are both nonzero
A projectile ie fired at at an angle of 45 degrees above the horizontal. If air resistance
is neglected, the line in the graph that best represents the horizontal displacement of
the projectile as a function of travel time is _______. - (CORRECT ANSWER)4
The information on a compact disk is scanned by a laser initially at a radius of 2.4 cm
and then out to a maximum of 6.0 cm. Because the dimensions of the pit information
remains constant with radius, the disk motor adjusts so that the tangential velocity
remains at a constant. What is the ratio of the inner to outer rotational velocities? -
(CORRECT ANSWER)2.5
A turntable has an angular velocity of 1.4 rad/s. The coefficient of static friction
between the turntable and a block placed on it is 0.20. The maximum distance from
the center of the turntable that the block can be placed without sliding is
approximately ______. - (CORRECT ANSWER)0.5 m
The density of seawater was measured to be 1.07 g/cm^3. The density in SI units is
____. - (CORRECT ANSWER)1.07x10^3 kg/m^3
A body of weight w is in free fall near the surface of the Earth. What force does the
body exert on the Earth? - (CORRECT ANSWER)w
The tension of the right-hand string (T2) divided by the tension of the left-hand string
(T1) is given by _____. - (CORRECT ANSWER)cos(theta1)/cos(theta2)
A car is traveling south at 30km/h. It rounds a curve, and 6s later it is traveling west
at 30km/h. The magnitude of the average acceleration of the car is _____. -
(CORRECT ANSWER)7.1 km/hr*s
A constant force of 45N directed at angle theta to the horizontal pulls a crate of
weight 100N from one end of a room to another a distance of 4m. Given that the
vertical component of the pulling force is 12N, calculate the work done by the force in
the moving crate. - (CORRECT ANSWER)1.7x10^2 J
A proud new Jaguar owner drives her car at a speed of 25m/s into a corner. The
coefficients of friction between the road and the tires are 0.70 (static) and 0.40
(kinetic). What is the minimum radius of curvature for the corner in order for the car
not to skid? - (CORRECT ANSWER)91 m
A particle has a momentum as a function of time given by vector P=7t(i hat)+9t^3(j
hat)+3sin(wt)(k hat) where w is a constant. The force acting on the particle is _____.
- (CORRECT ANSWER)7(i hat)+27t^2(j hat)+3wcos(wt)(k hat)
A physical quantity that is sometimes described as the measure of the resistance of
a body to a change in motion is ______. - (CORRECT ANSWER)mass
