SAT Physics Practice Questions 3 & answer key

1)An object is traveling along straight line with speed of 100 m/s, after 10 second the speed of this object is 200 m/s.
find the average acceleration?

A. $10  m/s^{2}$
B. $20  m/s^{2}$
C. $1  m/s^{2}$
D. $2  m/s^{2}$

2) One ball makes a rotation around circle of radius 2 m ,with speed of 10 m/s,
    find the frequency of motion in revolutions per second ?

A. 0.33
B. 0.48
C. 0.79
D. 0.88

3)One ball is projected upward with angle of 30 degree ,and initial speed of 50 m/s,
 find the time when the ball will be at the top of trajectory?

A. 5 s
B.10 s
C.15 s
D.25 s

4)We add 30 J of heat to a gas in a container ,and this gas does 10 J of work,
  find the internal energy ?
 A.10 J
 B.20 J
 C.30 J
 D.-20 J

Answer key:
1.A
3.A
2.C
4.D