Isaac Newton's contributions to physics include
a. the laws of motion
b. the law of universal gravitation
c. invention of the calculus
d. the invention of the reflecting telescope
e. all of the above
E
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A 2.4-kg ball falling vertically hits the floor with a speed of 2.5 m/s and rebounds with a speed of 1.5 m/s. What is the magnitude of the impulse exerted on the ball by the floor?
a. 9.6 N s b. 2.4 N s c. 6.4 N s d. 1.6 N s e. 1.0 N s
The graph below plots the escape velocity of several solar system objects along the vertical axis and the surface temperature along the horizontal. The lines plotted in the figure are the fastest speeds of gas particles as a function of temperature for various gases. Which of the gases plotted in this diagram could be retained by Miranda?
a.
only CO2
b.
only NH3
c.
CO2, NH3, and O2
d.
all of them
e.
none of them
The graph below shows the velocity versus time graph for a ball. Which explanation best fits the motion of the ball as shown by the graph?
a.
The ball is falling, is caught, and is thrown down with greater velocity.
b.
The ball is rolling, stops, and then continues rolling.
c.
The ball is rising, hits the ceiling, and falls down.
d.
The ball is falling, hits the floor, and bounces up.
e.
The ball is rising, is caught, and then is thrown down.
A vector in the xy-plane has an x component of -7.50 units. What must be the y component of this vector so that its magnitude is 10.0 units. (Note: There are two possible answers.)
What will be an ideal response?