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# Physics Past Questions | JAMB, WAEC, NECO and Post UTME Past Questions

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### Question 5051

A gun weighing 1500 kg fires a shot weighing 50 kg with a velocity 360 m/s. What is the recoil velocity of the gun?

A)
14.0 m/s
B)
12.0 m/s
C)
11.0 m/s
D)
13.0 m/s

### Question 5052

A load of 50 N is attached to one end of a long vertical wire of length 4 m and diameter 2.4 mm whose other end is fixed If the extension is 0.25 mm, calculate the Young modulus of the material of the wire.

### Options

A)
$$18N/m^{2}$$
B)
$$1800N/m2$$
C)
$$180 N/m2$$
D)
$$1.8 x 1011 N/m2$$

### Question 5053

A machine with a mass of 4 kg fires a 45 g bullet at a speed of 100 m/s. Find the recoil speed of the machine gun.

A)
1.1 m/s
B)
2 m/s
C)
3.5 m/s
D)
0 m/s

### Question 5054

A malaria patient has a body temperature of 98.6°F, What is this temperature on the Celsius scale?

A)
37 °C
B)
20 °C
C)
32 °C
D)
35 °C

### Question 5055

A man can row a boat at 13 m/s in still water. If he aims at crossing to the opposite bank of a river flowing at 5 m/s, at what angle to the bank of the river must he row the boat?

A)
67.4º
B)
2lº
C)
56.8º
D)
22.6º

### Question 5056

A machine gun fires a bullet with an initial velocity of 200 m/s at an angle of 600 to the horizontal. If g = 10 m/s2 , the total time of flight of the bullet is

A)
34.64 s
B)
17.32 s
C)
51.96
D)
69.28 s

### Question 5057

A machine has a velocity ratio of 6 and is 80% efficient. The effort needed to lift a load of 300 N with the aid of the machine is:

A)
48 N
B)
300 N
C)
62.5 N
D)
63.5 N

### Question 5058

A mango fruit dropped to the ground from the top of a tree 40 m tall. Find how long it takes the fruit to reach the ground if acceleration due to gravity g=10m/$$s^{2}$$

A)
2.2 s
B)
805 s
C)
4 s
D)
2 s

### Question 5059

A metal block of mass 2125 g displaces 250 cm3 of water. What is its density?

### Options

A)
$$8300 kg/m^{3}$$
B)
$$8800 kg/m^{3}$$
C)
$$8500 kg/m^{3}$$
D)
$$8700 kg/m^{3}$$