Q. If a 3 kg object is moving with a speed of 4 m/s and comes to a stop, what is the work done by friction?
A.
-24 J
B.
-48 J
C.
0 J
D.
24 J
Show solution
Solution
Initial kinetic energy = 0.5 × m × v² = 0.5 × 3 kg × (4 m/s)² = 24 J. Work done by friction = -24 J.
Correct Answer: B — -48 J
Learn More →
Q. If a 3 kg object is moving with a speed of 4 m/s and comes to a stop, what is the work done by the friction?
A.
-24 J
B.
-48 J
C.
-12 J
D.
-36 J
Show solution
Solution
Initial kinetic energy = 0.5 × 3 kg × (4 m/s)² = 24 J. Work done by friction = -24 J.
Correct Answer: B — -48 J
Learn More →
Q. If a 3 kg object is moving with a speed of 4 m/s and comes to a stop, what is the work done by the friction force?
A.
-24 J
B.
-48 J
C.
-72 J
D.
-96 J
Show solution
Solution
Initial kinetic energy = 0.5 × 3 kg × (4 m/s)² = 24 J. Work done by friction = -24 J.
Correct Answer: B — -48 J
Learn More →
Q. If a 3 kg object is moving with a speed of 4 m/s, what is the total mechanical energy if it is at a height of 2 m?
A.
30 J
B.
40 J
C.
50 J
D.
60 J
Show solution
Solution
Total mechanical energy = K.E + P.E = 0.5 × 3 kg × (4 m/s)² + 3 kg × 9.8 m/s² × 2 m = 24 J + 58.8 J = 82.8 J.
Correct Answer: C — 50 J
Learn More →
Q. If a 3 kg object is moving with a velocity of 4 m/s, what is its momentum?
A.
12 kg m/s
B.
6 kg m/s
C.
8 kg m/s
D.
10 kg m/s
Show solution
Solution
Momentum (p) = m * v = 3 kg * 4 m/s = 12 kg m/s
Correct Answer: A — 12 kg m/s
Learn More →
Q. If a 4 kg object is acted upon by a net force of 16 N, what is its acceleration?
A.
2 m/s²
B.
3 m/s²
C.
4 m/s²
D.
5 m/s²
Show solution
Solution
Using F = ma, we have a = F/m = 16 N / 4 kg = 4 m/s².
Correct Answer: C — 4 m/s²
Learn More →
Q. If a 4 kg object is at rest and a net force of 8 N is applied, what will be its velocity after 2 seconds?
A.
4 m/s
B.
2 m/s
C.
1 m/s
D.
0 m/s
Show solution
Solution
Using F = ma, a = F/m = 8 N / 4 kg = 2 m/s². Velocity after 2 seconds = a * t = 2 m/s² * 2 s = 4 m/s.
Correct Answer: B — 2 m/s
Learn More →
Q. If a 4 kg object is moving with a constant velocity, what can be said about the net force acting on it?
A.
It is zero
B.
It is equal to its weight
C.
It is equal to the applied force
D.
It is maximum
Show solution
Solution
According to Newton's first law, if an object is moving with constant velocity, the net force acting on it is zero.
Correct Answer: A — It is zero
Learn More →
Q. If a 5 kg object is in free fall, what is the force acting on it due to gravity?
A.
5 N
B.
10 N
C.
50 N
D.
15 N
Show solution
Solution
The force due to gravity F = mg = 5 kg * 10 m/s² = 50 N.
Correct Answer: C — 50 N
Learn More →
Q. If a 5 kg object is lifted to a height of 10 m, what is the potential energy gained by the object? (g = 9.8 m/s²)
A.
490 J
B.
980 J
C.
245 J
D.
2450 J
Show solution
Solution
Potential Energy = mass × g × height = 5 kg × 9.8 m/s² × 10 m = 490 J.
Correct Answer: B — 980 J
Learn More →
Q. If a 5 kg object is lifted to a height of 10 m, what is the work done against gravity?
A.
50 J
B.
100 J
C.
150 J
D.
200 J
Show solution
Solution
Work done = mgh = 5 kg × 9.8 m/s² × 10 m = 490 J.
Correct Answer: D — 200 J
Learn More →
Q. If a 5 kg object is lifted to a height of 10 m, what is the work done against gravity? (g = 9.8 m/s²)
A.
49 J
B.
98 J
C.
490 J
D.
980 J
Show solution
Solution
Work done = mgh = 5 kg × 9.8 m/s² × 10 m = 490 J.
Correct Answer: C — 490 J
Learn More →
Q. If a 5 kg object is subjected to a force of 20 N, what is its acceleration?
A.
2 m/s²
B.
4 m/s²
C.
5 m/s²
D.
10 m/s²
Show solution
Solution
Using F = ma, acceleration a = F/m = 20 N / 5 kg = 4 m/s².
Correct Answer: B — 4 m/s²
Learn More →
Q. If a 5 ohm resistor and a 10 ohm resistor are connected in series, what is the voltage across the 10 ohm resistor when a current of 2 A flows through the circuit?
A.
10 V
B.
20 V
C.
5 V
D.
15 V
Show solution
Solution
Voltage across the 10 ohm resistor, V = I * R = 2 A * 10 Ω = 20 V.
Correct Answer: B — 20 V
Learn More →
Q. If a 5 ohm resistor is connected to a 10V battery, what is the energy consumed in 2 seconds?
A.
10 J
B.
20 J
C.
5 J
D.
15 J
Show solution
Solution
Power P = V^2 / R = 10^2 / 5 = 20 W. Energy = Power * time = 20 W * 2 s = 40 J.
Correct Answer: B — 20 J
Learn More →
Q. If a 5 ohm resistor is connected to a 10V battery, what is the energy consumed in 2 minutes?
A.
60 J
B.
120 J
C.
240 J
D.
30 J
Show solution
Solution
Power P = V^2/R = 10^2 / 5 = 20 W. Energy = Power * time = 20 W * 120 s = 2400 J.
Correct Answer: B — 120 J
Learn More →
Q. If a 5Ω resistor is connected in parallel with a 10Ω resistor, what is the equivalent resistance?
A.
3.33Ω
B.
5Ω
C.
7.5Ω
D.
15Ω
Show solution
Solution
R_eq = 1/(1/5 + 1/10) = 3.33Ω.
Correct Answer: A — 3.33Ω
Learn More →
Q. If a 6 kg object is subjected to a net force of 24 N, what is its acceleration?
A.
4 m/s²
B.
6 m/s²
C.
8 m/s²
D.
10 m/s²
Show solution
Solution
Using F = ma, acceleration a = F/m = 24 N / 6 kg = 4 m/s².
Correct Answer: A — 4 m/s²
Learn More →
Q. If a 60W bulb operates at 120V, what is the resistance of the bulb?
A.
240 ohms
B.
120 ohms
C.
60 ohms
D.
30 ohms
Show solution
Solution
Using P = V^2 / R, R = V^2 / P = (120V)^2 / 60W = 240 ohms.
Correct Answer: B — 120 ohms
Learn More →
Q. If a 60W light bulb operates at 120V, what is the resistance of the bulb?
A.
240 ohms
B.
120 ohms
C.
60 ohms
D.
30 ohms
Show solution
Solution
Power (P) = V^2 / R, so R = V^2 / P = (120V)^2 / 60W = 240 ohms.
Correct Answer: B — 120 ohms
Learn More →
Q. If a 6V battery is connected to a circuit with a total resistance of 3 ohms, what is the current flowing through the circuit?
Show solution
Solution
Using Ohm's law, I = V/R = 6V / 3 ohms = 2A.
Correct Answer: B — 2A
Learn More →
Q. If a 6Ω resistor is connected to a 9V battery, what is the power dissipated by the resistor?
A.
6W
B.
9W
C.
12W
D.
15W
Show solution
Solution
Power P = V^2 / R = (9V)^2 / 6Ω = 81 / 6 = 13.5W.
Correct Answer: C — 12W
Learn More →
Q. If a 9V battery is connected to a 3Ω resistor, what is the power consumed by the resistor?
Show solution
Solution
Power P = V^2/R = (9V)^2 / 3Ω = 81/3 = 27W.
Correct Answer: B — 9W
Learn More →
Q. If A = 0 and B = 0, what is the output of A AND B?
A.
0
B.
1
C.
2
D.
Undefined
Show solution
Solution
The AND gate outputs 1 only when both inputs are 1. Since both A and B are 0, the output is 0.
Correct Answer: A — 0
Learn More →
Q. If A = 0 and B = 1, what is the output of A AND B?
A.
0
B.
1
C.
Undefined
D.
Both 0 and 1
Show solution
Solution
The output of A AND B is 0 when A is 0.
Correct Answer: A — 0
Learn More →
Q. If A = 0 and B = 1, what is the output of the OR gate?
A.
0
B.
1
C.
2
D.
Undefined
Show solution
Solution
An OR gate outputs 1 if at least one input is high. Since B is 1, the output is 1.
Correct Answer: B — 1
Learn More →
Q. If A = 0 and B = 1, what is the output of the XOR gate?
A.
0
B.
1
C.
2
D.
Undefined
Show solution
Solution
The XOR gate outputs 1 when the inputs are different. Since A is 0 and B is 1, the output is 1.
Correct Answer: B — 1
Learn More →
Q. If A = 1 and B = 1, what is the output of the AND gate?
A.
0
B.
1
C.
2
D.
Undefined
Show solution
Solution
The AND gate outputs 1 only when both inputs are high. Since A = 1 and B = 1, the output is 1.
Correct Answer: B — 1
Learn More →
Q. If A = 1 and B = 1, what is the output of the XOR gate?
A.
0
B.
1
C.
2
D.
Undefined
Show solution
Solution
An XOR gate outputs 1 only when the inputs are different. Since both inputs are 1, the output is 0.
Correct Answer: A — 0
Learn More →
Q. If A = 1, B = 1, and C = 0, what is the output of A OR (B AND C)?
A.
0
B.
1
C.
2
D.
Undefined
Show solution
Solution
B AND C = 1 AND 0 = 0. Then, A OR 0 = 1 OR 0 = 1.
Correct Answer: B — 1
Learn More →
Showing 1501 to 1530 of 5000 (167 Pages)
