Duplicate of physics exam (SAT) review - set 0

Question 1

Two carts (mass 0.40 & 1.2 kg) are released from rest; the light cart rolls at 0.6 m/s; vheavy?

Accepted Answer

0.20 m/s

Question 2

An object moves along a line [v(t) plotted]. The average speed during the first 4 s, in m/s, is

Accepted Answer

2.5

Question 3

Two forces, 10 N and 7 N, act on a body.The minimum resultant (net) force magnitude, in N, is

Accepted Answer

3

Question 4

Consider the circuit in the diagram below. What is the current as measured by the ammeter?

Accepted Answer

2 A

Question 5

Fast alpha particles are shot at a thin metallic foil. We observe that most of the particles

Accepted Answer

pass through with virtually no deflection.

Question 6

We project ball X horizontally and drop ball Y at the same time; both start at the same height.

Accepted Answer

X and Y will reach the level ground at the same time

Question 7

What average braking force is required to stop a 2500 kg car with speed 30 m/s in 15 seconds?

Accepted Answer

5.0 kN

Question 8

The approximate speed of light in water, in meters per second, is

Accepted Answer

2.3×108

Question 9

The Sun’s energy is believed to be a result of

Accepted Answer

nuclear fusion.

Question 10

Which of the following is equivalent to 1 Pascal (Pa) of gas pressure?

Accepted Answer

kg/(m·s2)

Question 11

Two resistors (20Ω, 60Ω) are in series. Voltage across the 20Ω is 80V. Current through the 60Ω:

Accepted Answer

is 4.0 A

Questions 11