Physics second exam 2

Question 1 of 18

1

The adjacent figure shows a setup of three masses that are connected by three wires. The whole system is under static equilibrium. If m1 = 10 kg, m2 = 20 kg and m3 = 30 kg, The tension (T1) in the first wire (measured in Newtons) is:

Select one of the following:

98
588
196
392
294

Explanation

Question 2 of 18

1

The figure to the right shows a mass 15-kg at rest and hanging from a vertical rope which is also hanging from two ropes. The tension T (in N) in the vertical rope is:

Select one of the following:

15
147
127
0
50

Explanation

Question 3 of 18

1

Three equal mass blocks each of mass m = 2 kg can move together over a horizontal frictionless surface. Two forces F1 = 40 N and F2 = 10 N are applied on the three masses system as shown in the figure the magnitude of the net force on the middle mass (in N) is:

Select one of the following:

3.3
10
30
6.7
0

Explanation

Question 4 of 18

1

A person stands on a scale in an elevator, The maximum and minimum scale reading are 591 N and 391 N respectively. If the acceleration of the elevator is constant , then the weight (N) of the person is:

Select one of the following:

50
541
100
200
491

Explanation

Question 5 of 18

1

In the figure mass m = 2 kg and the coefficients of static and kinetic friction are μs = 0.4, μk = 0.2 respectively. The acceleration (in m/s^2) of mass m is:

Select one of the following:

0.64
0
9.8
1.3
2

Explanation

Question 6 of 18

1

In the figure shown M = l0 kg and m = 4 kg. The coefficient of kinetic friction between the inclined surface and mass m is µk = 0.3. Given that the system started from rest, find the speed (in m/s) of mass M when it has fallen a distance of 2 m.

Select one of the following:

2.96
3.6
4.42
3.96
2.1

Explanation

Question 7 of 18

1

If the coefficient of kinetic friction (µk ) =0.2 , then the acceleration (in m/s^2 ) of the block is:

Select one of the following:

13.2
1
3.33
0
10.8

Explanation

Question 8 of 18

1

A small ball of mass is suspended from a string of length L The ball revolves with constant speed v in the horizontal circle of radius r as shown in the adjacent. if the string makes an angle θ with the vertical direction, the speed v of the ball is given by:

Select one of the following:

Explanation

Question 9 of 18

1

A 750 Kg travels at 90 km/h around a curve with radius of 160 m. the banking an angle of the curve so that the car makes the turn successfully is:

Select one of the following:

21.7 degree
9 degree
20.6 degree
25 degree
15 degree

Explanation

Question 10 of 18

1

A 2-kg object is held stationary on a wall by a horizontal force F as shown. The static coefficient of friction between the object and the wall is 0.5. What is the minimum force required to hold the object from sliding down?

Select one of the following:

39.2 N
23.5 N
9.8 N
49 N
19.6 N

Explanation

Question 11 of 18

1

Power P is required to lift a body a distanced at a constant speed v. The power required to lift the body a distance 2d at constant speed 6v is: (ignore air resistance)

Select one of the following:

P
2P
3P
6P
3P/2

Explanation

Question 12 of 18

1

Two balls A and B of masses 2m and m, respectively are raised to the same height h and then back to the initial point, the total work done by the gravitational Force on B is:

Select one of the following:

the same as the work done on A
one quarter the work done on A
one half the work done on A
Twice the work done on A
four times the work done on A

Explanation

Question 13 of 18

1

A spring under a compression x has a potential energy U when the compression is doubled 2x the potential energy stored in the spring is ?

Select one of the following:

U
2U
3U
4U
8U

Explanation

Question 14 of 18

1

A small object of mass m starts at rest at the position shown and sides along the frictionless (loop –the-loop) track of radius R what is the smallest value of ( y ) such that the object will slide without contact with the track?

Select one of the following:

R/2
R/4
R
2R
0

Explanation

Question 15 of 18

1

A skier starts with an initial speed vi = 10 m/s at the bottom of a rough steady upward 30° inclined plane as shown. The skier travels a distance of 6 m along the plane before coming to rest. The value of the coefficient of kinetic friction is:

Select one of the following:

0.17
1.55
0.7
0.4
0.91

Explanation

Question 16 of 18

1

If the block shown slides from rest from point A and comes to complete stop against the spring at point B after moving 3 meters, then amount the spring has been compressed (in m) is:

Select one of the following:

0.5
0.2
0.3
0.46
0.11

Explanation

Question 17 of 18

1

Ball of mass 150 g is fired straight up with an initial velocity vi=10 m/s. It raised up, reached its maximum height and then came to the same initial position . the work in joules done on the ball by gravitational force through the entire trip is :

Select one of the following:

20
8.3
2.41
1.94
Zero

Explanation

Question 18 of 18

1

A particle of mass m=5 kg is released from rest at Point A and slides on the frictionless truck shown in the adjacent figure if hA = 15 m and hB = 4 m The practical’s speed in m/s at point B is :

Select one of the following:

20
8.3
13.5
11.7
14.7

	Created by Teresa stars over 4 years ago

Quiz on Physics second exam 2 , created by Teresa stars on 15/12/2019.

Physics second exam 2

Question 1 of 18

The adjacent figure shows a setup of three masses that are connected by three wires. The whole system is under static equilibrium. If m1 = 10 kg, m2 = 20 kg and m3 = 30 kg, The tension (T1) in the first wire (measured in Newtons) is:

Select one of the following:

Explanation

Question 2 of 18

The figure to the right shows a mass 15-kg at rest and hanging from a vertical rope which is also hanging from two ropes. The tension T (in N) in the vertical rope is:

Select one of the following:

Explanation

Question 3 of 18

Three equal mass blocks each of mass m = 2 kg can move together over a horizontal frictionless surface. Two forces F1 = 40 N and F2 = 10 N are applied on the three masses system as shown in the figure the magnitude of the net force on the middle mass (in N) is:

Select one of the following:

Explanation

Question 4 of 18

A person stands on a scale in an elevator, The maximum and minimum scale reading are 591 N and 391 N respectively. If the acceleration of the elevator is constant , then the weight (N) of the person is:

Select one of the following:

Explanation

Question 5 of 18

In the figure mass m = 2 kg and the coefficients of static and kinetic friction are μs = 0.4, μk = 0.2 respectively. The acceleration (in m/s^2) of mass m is:

Select one of the following:

Explanation

Question 6 of 18

In the figure shown M = l0 kg and m = 4 kg. The coefficient of kinetic friction between the inclined surface and mass m is µk = 0.3. Given that the system started from rest, find the speed (in m/s) of mass M when it has fallen a distance of 2 m.

Select one of the following:

Explanation

Question 7 of 18

If the coefficient of kinetic friction (µk ) =0.2 , then the acceleration (in m/s^2 ) of the block is:

Select one of the following:

Explanation

Question 8 of 18

A small ball of mass is suspended from a string of length L The ball revolves with constant speed v in the horizontal circle of radius r as shown in the adjacent. if the string makes an angle θ with the vertical direction, the speed v of the ball is given by:

Select one of the following:

Explanation

Question 9 of 18

A 750 Kg travels at 90 km/h around a curve with radius of 160 m. the banking an angle of the curve so that the car makes the turn successfully is:

Select one of the following:

Explanation

Question 10 of 18

A 2-kg object is held stationary on a wall by a horizontal force F as shown. The static coefficient of friction between the object and the wall is 0.5. What is the minimum force required to hold the object from sliding down?

Select one of the following:

Explanation

Question 11 of 18

Power P is required to lift a body a distanced at a constant speed v. The power required to lift the body a distance 2d at constant speed 6v is: (ignore air resistance)

Select one of the following:

Explanation

Question 12 of 18

Two balls A and B of masses 2m and m, respectively are raised to the same height h and then back to the initial point, the total work done by the gravitational Force on B is:

Select one of the following:

Explanation

Question 13 of 18

A spring under a compression x has a potential energy U when the compression is doubled 2x the potential energy stored in the spring is ?

Select one of the following:

Explanation

Question 14 of 18

A small object of mass m starts at rest at the position shown and sides along the frictionless (loop –the-loop) track of radius R what is the smallest value of ( y ) such that the object will slide without contact with the track?

Select one of the following:

Explanation

Question 15 of 18

A skier starts with an initial speed vi = 10 m/s at the bottom of a rough steady upward 30° inclined plane as shown. The skier travels a distance of 6 m along the plane before coming to rest. The value of the coefficient of kinetic friction is:

Select one of the following:

Explanation

Question 16 of 18

If the block shown slides from rest from point A and comes to complete stop against the spring at point B after moving 3 meters, then amount the spring has been compressed (in m) is:

Select one of the following:

Explanation

Question 17 of 18

Ball of mass 150 g is fired straight up with an initial velocity vi=10 m/s. It raised up, reached its maximum height and then came to the same initial position . the work in joules done on the ball by gravitational force through the entire trip is :

Select one of the following:

Explanation

Question 18 of 18

A particle of mass m=5 kg is released from rest at Point A and slides on the frictionless truck shown in the adjacent figure if hA = 15 m and hB = 4 m The practical’s speed in m/s at point B is :

Select one of the following:

Explanation