1) A car initially at rest at a traffic light accelerates at 3m/s' when the light turns green. After 4s, the position of the car (in m) is: A) 24 B) 16 C) 8 D) 12 E) 6 2) A ball is dropped from a window 60m ahoun ground (in
1) A car initially at rest at a traffic light accelerates at 3m/s' when the light turns green. After 4s, the position of the car (in m) is: A) 24 B) 16 C) 8 D) 12 E) 6 2) A ball is dropped from a window 60m ahoun ground (in
College Physics
11th Edition
ISBN:9781305952300
Author:Raymond A. Serway, Chris Vuille
Publisher:Raymond A. Serway, Chris Vuille
Chapter1: Units, Trigonometry. And Vectors
Section: Chapter Questions
Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...
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please solve question 1
Transcribed Image Text:14
15
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1) A car initially at rest at a traffic light accelerates at 3m/s when the light turns green. After
4s, the position of the car (in m) is:
A) 24
B) 16
C) 8
2) A ball is dropped from a window 60m above the ground. The velocity of the ball when it strikes the
ground (in m/s) is:
D) 12
E) 6
A) 34.3
В) 24.3
C) 19.6
D) 14.3
3) A ball is kicked from ground level with a velocity of 16m/s at an angle of 30° to the horizontal
direction. When does it reach its greatest higher (in s)?
E) 8.3
A) 0.82
B) 1.63
C) 1.28
D) 1.02
E) 1.84
4) Two vectors, A= 2x+3y and B= 4x-8y. The magnitude of A+B is:
A) 4.3
B) 5.1
C) 7.8
D) 6.4
E) 9.2
5) An ice hockey player strikes a puck of mass 170g with his stuck, accelerating it along the ice from
rest to speed of 20m/s over a distance of 40cm. What force must he exert (in N)? (Assume the
acceleration is constant and without friction)
A) 48
B) 72
С) 85
D) 96
E) 57
6) A 80kg box standing on a floor has a coefficient of static friction of 0.5. A boy approaches the box
and leans horizontally against it. The maximum force the boy can exert before the box begins to slip
(in N) is:
C) 549
D) 332
E) 392
A) 618
B) 425
7) From figure below, the torques due to F1 and F2 relative to point p (in N.m) is:
4m-
2m-
F1=6N
F-8N/30
E) 0
D) 10.1
C) - 11.2
В) 11.2
A) 12.4
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