Vectors and Dynamics Quiz

Description

Á Physics quiz on vectors and dynamics
Jeffrey Piggott
Quiz by Jeffrey Piggott, updated more than 1 year ago
Jeffrey Piggott
Created by Jeffrey Piggott almost 4 years ago
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Resource summary

Question 1

Question
Unless acted on by an external net force, an object will stay at rest or ........
Answer
  • A come to rest.
  • B decelerate at a constant rate
  • C slow from a given speed
  • D continue to move in a straight line at a constant speed.

Question 2

Question
A 65.0 kg block is being accelerated along a level surface. The applied force is 500 N and the friction force is 300 N. What is the coefficient of friction between the block and the surface?
Answer
  • A 0.31
  • B 0.47
  • C 0.78
  • D 1.30

Question 3

Question
A 2.00 kg object, initially at rest on the ground, is accelerated vertically by a rope, as shown. The object reaches a height of 3.00 m in 1.50 s. What is the tension in the rope during the acceleration?
Answer
  • A 5.33 N
  • B 14.3 N
  • C 23.6 N
  • D 24.9 N

Question 4

Question
A 4.00 kg block is accelerated along a level surface at 3.00 m/s^2. The applied force is 20.0 N. What is the coefficient of friction between the block and the surface?e applied force is 20.0 N.
Answer
  • A 0.20
  • B 0.31
  • C 0.51
  • D 0.67

Question 5

Question
A 3.00 kg object is being accelerated vertically upwards at 2.80 m/s^2, as shown. What is the tension in the cord?
Answer
  • A 8.40 N
  • B. 21.0 N
  • C. 29.4 N
  • D. 37.8 N

Question 6

Question
What minimum horizontal force F will just prevent the 5.0 kg block from sliding if the coefficient of friction between the wall and the block is 0.65?
Answer
  • A. 6.4 N
  • B. 32 N
  • C. 49 N
  • D. 75 N

Question 7

Question
An object is sliding down a smooth incline. If friction is negligible, the object has......
Answer
  • A constant velocity.
  • B constant momentum.
  • C. constant acceleration
  • D constant displacement.

Question 8

Question
A pendulum is swinging freely between points R and S as shown in the diagram below. Which of the following diagrams best represents the forces acting on the pendulum bob at point R?

Question 9

Question
A constant force is applied to an object on a frictionless surface, as shown in the diagram below. The resulting motion has .....
Answer
  • A constant velocity.
  • B constant momentum.
  • C constant acceleration.
  • D constant kinetic energy.

Question 10

Question
What is the frictional force due to air resistance on a 0.50 kg object falling vertically with an acceleration of 8.5 m/s^2 ?
Answer
  • A 0.65 N
  • B 4.3 N
  • C 4.9 N
  • D 9.2 N

Question 11

Question
The diagram below shows a cart being pulled up a frictionless slope by a rope. Which of the following best represents the free body diagram for the cart?

Question 12

Question
A massless, frictionless pulley is suspended by a rope. When the masses are allowed to accelerate, the tension in the string joining them is 28 N at X . What will the tension be at Y and at Z?
Answer
  • A Tension at Y = 20 N; Tension at Z = 40 N
  • B Tension at Y = 20 N; Tension at Z = 69 N
  • C Tension at Y = 28 N; Tension at Z = 56 N
  • D Tension at Y = 28 N; Tension at z = 69 N

Question 13

Question
The frictionless system shown accelerates at 1.60 m/s^2 when released. Find the tension in the string while the system is accelerating.
Answer
  • A 3.20 N
  • B 16.4 N
  • C 19.6 N
  • D 22.8 N

Question 14

Question
Force F gives mass m1 an acceleration of 4.0 m/s^2. The same force F gives mass m2 an acceleration of 2.0 m/s^2 What acceleration would force F give to the two masses m1 and m2 if they were glued together?
Answer
  • A 1.0 m/s^2
  • B 1.3 m/s^2
  • C 3.0 m/s^2
  • D 6.0 m/s^2

Question 15

Question
A 4.0 kg block has a speed of 9.0 m/s at X. What is the maximum distance, d, travelled by the block? Ignore friction.
Answer
  • A 0.92 m
  • B 1.6 m
  • C 4.1 m
  • D 7.2 m

Question 16

Question
The tension in the string shown is 12 N. Find the acceleration of mass m1.
Answer
  • A 3.0 m/s^2
  • B 6. 4 m/s^2
  • C 6.8 m/s^2
  • D 13 m/s^2

Question 17

Question
A 75 kg man stands on a scale while accelerating upwards in an elevator. If the scale reads 850 N, what is the magnitude of the acceleration of the elevator?
Answer
  • A 1.2 m/s^2
  • B 1.5 m/s^2
  • C 9.8 m/s^2
  • D 11 m/s^2

Question 18

Question
A 45 kg toboggan and rider decelerate on level snow at 0.53 m/s^2 What is the coefficient of friction between the toboggan and the snow?
Answer
  • A 0.012
  • B 0.054
  • C 0.22
  • D 0.53

Question 19

Question
The 2.0 kg head of an axe strikes a tree horizontally at 40 m/s. The blade penetrates 0.040 m into the tree. What is the average force exerted by the blade on this tree?
Answer
  • A 2.0 x 10^1 N
  • B 2.0 x 10^3 N
  • C 2.0 x 10^4 N
  • D 4.0 x 10^4 N
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