College of Science

Applied Physics

Quiz #1

Date Time:

Students Name

Students ID & section

Course Name Physics (1)

Course Code 1430-115

Semester Spring 2014 - 2015

Instructors Name Dr. Attaelmanan

University of Sharjah

College of Sciences

Applied Physics Department

1.1 pt A cereal box has the dimensions of 0.19 m x 0.28 m x 0.070 m. What is the volume of the box

in cubic feet?. ( Take 1ft = 12in , 1in = 2.54 cm ).

a. 0.13 cubic feet

b. 0.040 cubic feet

c. 0.012 cubic feet

d. 0.0037 cubic feet

2. 1 pt The number 0.00017 has how many significant figures?.

a. 2 b. 3 c. 5 d. 6

3. 1 pt Calculate (0.82 + 0.042) x (4.4 x 10^3), keeping only significant figures.

a. b. 3784 c. 3793 d. 3520

4. 1 pt A bird, accelerating from rest at a constant rate, experiences a displacement of 28 m in 11s. What is its acceleration?.

a. b. c. d.

5. 6 pts A rock is thrown straight up from a height of 8 m, with an initial velocity of 19.6 m/s.

a. [1pt] What is the rock displacement after 2 s ?.

y = 19.6x2 9.81x4/2 = 19.58 m

b. [1.5pts] What maximum height from the ground will the rock reach?

Hmax = 19.58 + 8 = 27.58 m

c. [1.5pts] What time interval elapses between the rocks being thrown and its return to the

original launch point?

T = 4 seconds

d. [2pts] What is its velocity when it hits the ground?

v2 = vo

2 + 2ay = 19.62 + 2 x 9.81 x 8 = 541.12

v = -23.26 m/s