please solve question 1 141516171) A car initially at rest at a traffic light accelerates at 3m/s when the light turns green. After4s, the position of the car (in m) is:A) 24B) 16C) 82) A ball is dropped from a window 60m above the ground. The velocity of the ball when it strikes theground (in m/s) is:D) 12E) 6A) 34.3В) 24.3C) 19.6D) 14.33) A ball is kicked from ground level with a velocity of 16m/s at an angle of 30° to the horizontaldirection. When does it reach its greatest higher (in s)?E) 8.3A) 0.82B) 1.63C) 1.28D) 1.02E) 1.844) Two vectors, A= 2x+3y and B= 4x-8y. The magnitude of A+B is:A) 4.3B) 5.1C) 7.8D) 6.4E) 9.25) An ice hockey player strikes a puck of mass 170g with his stuck, accelerating it along the ice fromrest to speed of 20m/s over a distance of 40cm. What force must he exert (in N)? (Assume theacceleration is constant and without friction)A) 48B) 72С) 85D) 96E) 576) A 80kg box standing on a floor has a coefficient of static friction of 0.5. A boy approaches the boxand leans horizontally against it. The maximum force the boy can exert before the box begins to slip(in N) is:C) 549D) 332E) 392A) 618B) 4257) From figure below, the torques due to F1 and F2 relative to point p (in N.m) is:4m-2m-F1=6NF-8N/30E) 0D) 10.1C) - 11.2В) 11.2A) 12.4

1) Given Initial velocity(u) = 0 Time (t) = 4 sec Acceleration (a) = 3 m/s2

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

1st Edition

ISBN:9781938168000

Author:Paul Peter Urone, Roger Hinrichs

Publisher:Paul Peter Urone, Roger Hinrichs

Chapter3: Two-dimensional Kinematics

Section: Chapter Questions

Problem 67PE: An ice hockey player is moving at 8.00 m/s when he hits the puck toward the goal. The speed of the...

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Concept explainers

Relative Velocity

It is a measurement of an object with regards to the other object which is moving or stable or stationary. For example, if we are traveling in a bus and the bus is moving at speed of 50km/hr, then our speed is according to the nearby passenger on the bus is zero. According to them, we are not moving. But if one person standing on the ground or road observes us from outside of the bus, according to him we are moving at a speed of 50km/hr and the bus is also moving at a speed of 50km/hr. Now, the motion is recognized by the observer, it depends on a frame of reference or observer. This is motion called relative motion.

Question

please solve question 1

14
15
16
17
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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